PHARMACEUTICAL COMPOSITION, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

Abstract

A pharmaceutical composition, a preparation method therefor and an application thereof. The pharmaceutical composition comprises the following components: a compound represented by formula I, hydroxypropyl methyl cellulose, benzalkonium chloride, and a pH regulator. The pharmaceutical composition can be used for preparing drugs for preventing or treating cataracts. The pharmaceutical composition has excellent stability in respect of exposure to light and to high temperatures, can be stored at room temperature, is convenient for patients to use, has pH and osmotic pressure close to those in the intraocular environment, is uniform in particle size distribution, and thus can give the patients good comfort.

Description

TECHNICAL FIELD

The present invention belongs to the field of medicine, specifically relates to a pharmaceutical composition, a preparation method therefor and an application thereof.

BACKGROUND

Cataracts is a disease of the eye that occurs on the lens inside the eyeball, and the opacity of the lens is collectively called cataracts. All of aging, genetics, metabolic abnormalities, trauma, radiation, poisoning, and local malnutrition can cause damage to the lens capsule, increase its permeability, lose its barrier effect, or lead to lens metabolism disorders, denature the lens protein to form opacity. If the lens of the eyeball changes from transparent to opaque, affecting the illumination received by the eye, it will affect the eye's vision. The impact on vision is less severe when the opacity is mild, and as the degree of opacity progresses, the vision decreases, leading to blindness in severe cases. Cataracts is one of the most common causes of blinding eye and is a major cause of blindness. Because the mechanism of cataracts formation is still unclear, no breakthrough has been made in drug treatment so far. Therefore, the only known effective treatment is surgery currently.

Although the continuous advancement of cataracts surgery has provided great help for the treatment of cataracts, the cure rate of surgical treatment is still far lower than the incidence rate, and there is a possibility of serious complications. On the other hand, cataracts surgery is very expensive and places a huge burden on patients and the health insurance system. Therefore, the prevention and treatment with drugs plays an important role.

At present, the clinical drugs for the treatment of cataracts include: (1) aldose reductase inhibitors, such as Cataline (Catalin, Pirenoxine Eye Drops, Pirenoxine Sodium Eye Drops), Phacolysin, Bendazac L-lysine, etc.; (2) antioxidant damage drugs, such as glutathione, taurine, aspirin, etc.; (3) nutritional metabolism drugs, such as vitamins, carotenoids, etc.; (4) traditional Chinese medicine composition, including ShiHu YeGuangWan, QijuDihuangWan, ShiJueMingSan, etc. However, these drugs for the treatment of cataracts have been proven by long-term clinical trials that can only delay the deterioration of cataracts, but cannot reverse the condition to treat cataracts. Therefore, there is a great clinical need for new varieties of ophthalmic topical anti-cataracts drugs that are safe, and have good efficacy, strong intraocular penetration, and stable properties.

Lanosterol is an amphiphilic molecule enriched in the lens, which is synthesized by a key cyclization reaction of lanosterol synthase (LSS) in the cholesterol synthesis pathway, which can reduce the abnormal aggregation of lens proteins, make them rearrange and restore crystal transparency. It has been shown that lanosterol synthase can be detected in the lens. In addition, in the Shumiya cataracts rat study, a homozygous mutation-specific combination of lanosterol synthase and farnesyl diphosphate farnesyltransferase 1 (FDFT1) attenuated the level of cholesterol in the lens and caused cataracts. In addition, lanosterol can significantly reduce the preformed lens protein aggregates in vitro and at the cellular levels; it has also been confirmed in vivo that lanosterol can reverse the condition of cataracts, making the lens clear and transparent, and is a new molecule for the prevention and treatment of cataracts.

It is disclosed in WO2020177714 a formulation of a lanosterol prodrug compound that can reduce cataracts symptoms, improve lens clarity, and lens GSH-PX activity. However, the preparation process of the formulation is complex to operate, the stability is poor, it is not easy to store at room temperature, and patients find that the comfort level is not good when using it. Therefore, there is an urgent clinical need to develop a composition or formulation with a simple preparation process, strong stability, and better comfort level for patients.

SUMMARY

In view of the deficiencies of the prior art, an object of the present invention is to provide a pharmaceutical composition, a preparation method therefor and a use thereof. The pharmaceutical composition has excellent stability in respect of exposure to light and high temperature and can be used to prepare a medicament for preventing or treating cataracts or floaters.

To achieve this purpose, the present invention adopts the following technical solutions.

In the first aspect, the present invention provides a pharmaceutical composition comprising the following components:

• • a compound of formula I, hydroxypropyl methylcellulose, benzalkonium chloride and a pH regulator;

It is found and developed according to the present invention that the stability of the compound of formula I can be significantly improved by combining the compound of formula I with hydroxypropyl methylcellulose (HPMC), benzalkonium chloride and a pH regulator, so as to obtain a pharmaceutical composition with stable quality.

In some embodiments of the present invention, the pharmaceutical composition comprises the components with the following parts by weight:

• • 0.01˜4 parts of compound of formula I (for example, it can be 0.01 parts, 0.05 parts, 0.1 parts, 0.3 parts, 0.5 parts, 0.8 parts, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts or 4 parts, etc.), 2˜12 parts of hydroxypropyl methylcellulose (for example, it can be 2 parts, 3 parts, 5 parts, 8 parts, 10 parts or 12 parts, etc.), 0.05˜0.06 parts of benzalkonium chloride (for example, it can be 0.05 parts, 0.052 parts, 0.053 parts, 0.055 parts, 0.056 parts, 0.058 parts or 0.06 parts, etc.) and 1˜20 parts of pH regulator (for example, it can be 1 part, 2 parts, 3 parts, 5 parts, 8 parts, 10 parts, 12 parts, 15 parts, 18 parts or 20 parts, etc.); and
  • the pH of the pharmaceutical composition is 6 to 8, for example it can be 6, 6.2, 6.5, 6.8, 7, 7.2, 7.5, 7.8 or 8, etc.

In some embodiments of the present invention, the concentration of the compound of formula I in the pharmaceutical composition is 0.01˜4 mg/mL, and preferably 0.1 mg/mL, 0.2 mg/mL, 0.3 mg/mL, 0.4 mg/mL, 0.5 mg/mL, 1 mg/mL, 2 mg/mL, 3 mg/mL or 4 mg/mL.

In some embodiments of the present invention, the pH regulator is selected from one or a combination of at least two of the group consisting of sodium hydroxide, hydrochloric acid, sodium citrate, citric acid, boric acid, borax, sodium dihydrogen phosphate, disodium hydrogen phosphate, potassium dihydrogen phosphate and dipotassium hydrogen phosphate.

In some embodiments of the present invention, the pharmaceutical composition further comprises a solubilizer.

In some embodiments of the present invention, the parts by weight of the solubilizer in the pharmaceutical composition is 10˜50 parts; for example, it can be 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts or 50 parts, etc.

In some embodiments of the present invention, the solubilizer is selected from one or a combination of at least two of the group consisting of polysorbate-80, glycerol, hydrogenated castor oil-RH40, polyethylene glycol 400, hydroxypropyl-ß-cyclodextrin and poloxamer 188.

In some embodiments of the present invention, the pharmaceutical composition comprises the components with the following parts by weight:

• • 2 parts of compound of formula I, 6 parts of hydroxypropyl methylcellulose, 16.5 parts of boric acid, 2 parts of borax and 0.05 parts of benzalkonium chloride; or
  • 2 parts of compound of formula I, 6 parts of hydroxypropyl methylcellulose, 40 parts of polysorbate-80, 16 parts of boric acid, 1.6 parts of borax and 0.05 parts of benzalkonium chloride; or
  • 2 parts of compound of formula I, 6 parts of hydroxypropyl methylcellulose, 10 parts of hydrogenated castor oil-RH40, 17 parts of boric acid, 1.7 parts of borax and 0.05 parts of benzalkonium chloride.

In the second aspect, the present invention provides a pharmaceutical composition comprising the components with the following parts by weight:

• • 2 parts of compound of formula I, 6 parts of hydroxypropyl methylcellulose, 25 parts of glycerol and 0.05 parts of benzalkonium chloride; or
  • 2 parts of compound of formula I, 6 parts of hydroxypropyl methylcellulose, 10 parts of hydrogenated castor oil-RH40, 40 parts of polysorbate-80, 25 parts of glycerol, and 0.05 parts of benzalkonium chloride.

In some embodiments of the present invention, the particle size of the compound of formula I is <90 μm, and preferably is ≤50 μm.

In some embodiments of the present invention, the particle size distribution of the compound of formula I is D₉₀≤7 μm and/or D₅₀≤4 μm.

In some embodiments of the present invention, the particle size of D₉₀ of the compound of formula I is <8 μm.

In some embodiments of the present invention, the particle size of D₅₀ of the compound of formula I is ≤3.5 μm.

In some embodiments of the present invention, the dosage form of the pharmaceutical composition is a suspension, an emulsion or a gel, and preferably an emulsion.

In the third aspect, the present invention provides a preparation method for the pharmaceutical composition as described in the first or second aspect, and the preparation method comprises: mixing evenly the compound of formula I, hydroxypropyl methylcellulose, benzalkonium chloride, the optional pH regulator and the optional solubilizer according to the prescription amount to obtain the pharmaceutical composition.

It should be noted that the term “optional” as used in the present invention refers to the presence or absence of a corresponding component. When the pharmaceutical composition contains a corresponding component, the component is used in the preparation method, and when the pharmaceutical composition does not contain the corresponding component, the component is not used in the preparation method.

In some embodiments of the present invention, the preparation method comprises the following steps:

• • (1) dissolving hydroxypropyl methylcellulose with water for injection to obtain solution I;
  • (2) dissolving the components other than hydroxypropyl methylcellulose and the compound of formula I in prescription amount with water for injection, then adding to the solution I, and mixing evenly to obtain solution II;
  • (3) taking a prescription amount of the compound of formula I, adding to the solution II, and mixing evenly to obtain solution III; and
  • (4) filling the solution III to full volume with water for injection to obtain the pharmaceutical composition.

Preferably, the preparation method comprises the following steps:

• • (1) dissolving hydroxypropyl methylcellulose with water for injection, and stirring to dissolve completely to obtain solution I;
  • (2) dissolving the components other than hydroxypropyl methylcellulose and the compound of formula I in prescription amount with water for injection, then adding to the solution I, adding water for injection to 90% of the prescription amount, and stirring well to obtain solution II;
  • (3) taking a prescription amount of the compound of formula I, and adding to the solution II to obtain solution III;
  • (4) homogenizing the solution III with a high-pressure homogenizer to obtain solution IV; and
  • (5) filling the solution IV to full volume with water for injection to obtain the pharmaceutical composition.

In the fourth aspect, the present invention provides a use of the pharmaceutical composition as described in the first or second aspect in the preparation of a medicament for the prevention or treatment of cataracts or floaters.

Compared with the prior art, the present invention has the following beneficial effects:

The pharmaceutical composition provided according to the present invention can be used to prevent or treat cataracts and floaters. After the pharmaceutical composition was placed under a condition of 4500Lx illumination or a high-temperature condition of 60° C. for 10 days, the pH and osmotic pressure of the pharmaceutical composition remained stable, the relevant substances and contents had no obvious change. The pharmaceutical composition has excellent stability in respect of exposure to light and high temperature, can be stored at room temperature, and is convenient for patients to use. At the same time, the pharmaceutical composition has a pH and osmotic pressure close to those in the intraocular environment, is uniform in particle size distribution, has D₅₀ particle size not exceeding 3.5 μm, and thus can give the patient good comfort.

DETAILED DESCRIPTION

The technical solution of the present invention is further described below by specific embodiments. Those skilled in the art should be aware that the specific embodiments are merely to aid in understanding the present invention and should not be regarded as a specific limitation of the present invention.

Example 1

The present example provides a pharmaceutical composition with the components shown in the following table:

Components            Amount (g)
Compound of formula I 2.0
HPMC                  6.0
Boric acid            16.5
Borax                 2
Benzalkonium chloride 0.05
Water                 volume up to 1000 mL

The preparation method for the pharmaceutical composition in this example is as follows:

• • (1) hydroxypropyl methylcellulose was dissolved with 10% boiling water for injection, added with an appropriate amount of cold water for injection, and stirred to dissolve completely to obtain solution I;
  • (2) boric acid, borax and benzalkonium chloride in prescription amount were dissolved under stirring with an appropriate amount of water for injection, then added to solution I, added with water for injection to 90% of the prescription amount, and stirred evenly to obtain solution II;
  • (3) the prescription amount of the compound of formula I was weighed, added to solution II, dispersed at a speed of 10000 r/min with a high-shear emulsifier for 10 minutes, and dispersed evenly to obtain solution III;
  • (4) the solution III was homogenized with a high-pressure homogenizer at a pressure of 250 bar once, the liquid medicine was collected, the pipeline of the high-pressure homogenizer was rinsed with an appropriate amount of sterile water for injection, the rinsing solution was collected, and combined with the liquid medicine to obtain solution IV; and
  • (5) the solution IV was filled to full volume with the sterile water for injection.

The above-mentioned pharmaceutical composition can be further prepared as an eye drop product by the following steps: the sample was taken to detect the pH, osmotic pressure and content, and after passing the quality inspection, sub-packed in low-density polyethylene pharmaceutical eye drop bottles in sterile environment with 5 mL liquid medicine per bottle.

Example 2

The present example provides a pharmaceutical composition with the components shown in the following table:

Components            Amount (g)
Compound of formula I 2.0
HPMC                  6.0
Polysorbate-80        40
Boric acid            16
Borax                 1.6
Benzalkonium chloride 0.05
Water                 volume up to 1000 mL

The preparation method for the pharmaceutical composition in this example is as follows:

• • (1) hydroxypropyl methylcellulose was dissolved with 10% boiling water for injection, added with an appropriate amount of cold water for injection, and stirred to dissolve completely to obtain solution I;
  • (2) boric acid, borax and benzalkonium chloride in prescription amount were dissolved under stirring with an appropriate amount of water for injection, then added to solution I, slowly added with the prescription amount of polysorbate-80 while stirring, added with water for injection to 90% of the prescription amount, and stirred evenly to obtain solution II;
  • (3) the prescription amount of the compound of formula I was weighed, added to solution II, dispersed at a speed of 10000 r/min with a high-shear emulsifier for 10 minutes, and dispersed evenly to obtain solution III;
  • (4) the solution III was homogenized with a high-pressure homogenizer at a pressure of 250 bar once, the liquid medicine was collected, the pipeline of the high-pressure homogenizer was rinsed with an appropriate amount of sterile water for injection, the rinsing solution was collected, and combined with the liquid medicine to obtain solution IV; and
  • (5) the solution IV was filled to full volume with the sterile water for injection.

The above-mentioned pharmaceutical composition can be further prepared as an eye drop product by the following steps: the sample was taken to detect the pH, osmotic pressure and content, and after passing the quality inspection, sub-packed in low-density polyethylene pharmaceutical eye drop bottles in sterile environment with 5 mL liquid medicine per bottle.

Example 3

The present example provides a pharmaceutical composition with the components shown in the following table:

Components                   Amount (g)
Compound of formula I        2.0
HPMC                         6.0
Hydrogenated castor oil-RH40 10
Boric acid                   17
Borax                        1.7
Benzalkonium chloride        0.05
Water                        volume up to 1000 mL

The preparation method for the pharmaceutical composition in this example is as follows:

• • (1) hydroxypropyl methylcellulose was dissolved with 10% boiling water for injection, added with an appropriate amount of cold water for injection, and stirred to dissolve completely to obtain solution I;
  • (2) boric acid, borax and benzalkonium chloride in prescription amount were dissolved under stirring with an appropriate amount of water for injection, then added to solution I, slowly added with the prescription amount of hydrogenated castor oil-RH40 while stirring, added with water for injection to 90% of the prescription amount, and stirred evenly to obtain solution II;
  • (3) the prescription amount of the compound of formula I was weighed, added to solution II, dispersed at a speed of 10000 r/min with a high-shear emulsifier for 10 minutes, and dispersed evenly to obtain solution III;
  • (4) the solution III was homogenized with a high-pressure homogenizer at a pressure of 250 bar once, the liquid medicine was collected, the pipeline of the high-pressure homogenizer was rinsed with an appropriate amount of sterile water for injection, the rinsing solution was collected, and combined with the liquid medicine to obtain solution IV; and
  • (5) the solution IV was filled to full volume with the sterile water for injection.

The above-mentioned pharmaceutical composition can be further prepared as an eye drop product by the following steps: the sample was taken to detect the pH, osmotic pressure and content, and after passing the quality inspection, sub-packed in low-density polyethylene pharmaceutical eye drop bottles in sterile environment with 5 mL liquid medicine per bottle.

Example 4

The present example provides a pharmaceutical composition with the components shown in the following table:

Components            Amount (g)
Compound of formula I 2.0
HPMC                  6.0
Glycerol              25
Benzalkonium chloride 0.05
Water                 volume up to 1000 mL

The preparation method for the pharmaceutical composition in this example is as follows:

• • (1) hydroxypropyl methylcellulose was dissolved with 10% boiling water for injection, added with an appropriate amount of cold water for injection, and stirred to dissolve completely to obtain solution I;
  • (2) the prescription amount of benzalkonium chloride was dissolved under stirring with an appropriate amount of water for injection, then added to solution I, slowly added with the prescription amount of glycerol while stirring, added with water for injection to 90% of the prescription amount, and stirred evenly to obtain solution II;
  • (3) the prescription amount of the compound of formula I was weighed, added to solution II, dispersed at a speed of 10000 r/min with a high-shear emulsifier for 10 minutes, and dispersed evenly to obtain solution III;
  • (4) the solution III was homogenized with a high-pressure homogenizer at a pressure of 250 bar once, the liquid medicine was collected, the pipeline of the high-pressure homogenizer was rinsed with an appropriate amount of sterile water for injection, the rinsing solution was collected, and combined with the liquid medicine to obtain solution IV; and
  • (5) the solution IV was filled to full volume with the sterile water for injection.

The above-mentioned pharmaceutical composition can be further prepared as an eye drop product by the following steps: the sample was taken to detect the pH, osmotic pressure and content, and after passing the quality inspection, sub-packed in low-density polyethylene pharmaceutical eye drop bottles in sterile environment with 5 mL liquid medicine per bottle.

Example 5

The present example provides a pharmaceutical composition with the components shown in the following table:

Components                   Amount (g)
Compound of formula I        2.0
HPMC                         6.0
Hydrogenated castor oil-RH40 10
Polysorbate-80               40
Glycerol                     25
Benzalkonium chloride        0.05
Water                        volume up to 1000 mL

The preparation method for the pharmaceutical composition in this example is as follows:

• • (1) hydroxypropyl methylcellulose was dissolved with 10% boiling water for injection, added with an appropriate amount of cold water for injection, and stirred to dissolve completely to obtain solution I;
  • (2) the prescription amount of benzalkonium chloride was dissolved under stirring with an appropriate amount of water for injection, then added to solution I, slowly added with hydrogenated castor oil-RH40, polysorbate-80 and glycerol in prescription amount while stirring, added with water for injection to 90% of the prescription amount, and stirred evenly to obtain solution II;
  • (3) the prescription amount of the compound of formula I was weighed, added to solution II, dispersed at a speed of 10000 r/min with a high-shear emulsifier for 10 minutes, and dispersed evenly to obtain solution III;
  • (4) the solution III was homogenized with a high-pressure homogenizer at a pressure of 250 bar once, the liquid medicine was collected, the pipeline of the high-pressure homogenizer was rinsed with an appropriate amount of sterile water for injection, the rinsing solution was collected, and combined with the liquid medicine to obtain solution IV; and
  • (5) the solution IV was filled to full volume with the sterile water for injection.

The above-mentioned pharmaceutical composition can be further prepared as an eye drop product by the following steps: the sample was taken to detect the pH, osmotic pressure and content, and after passing the quality inspection, sub-packed in low-density polyethylene pharmaceutical eye drop bottles in sterile environment with 5 mL liquid medicine per bottle.

Comparative Example 1

Provided is a pharmaceutical composition with the components shown in the following table:

Components            Amount (g)
Compound of formula I 2.0
HPMC                  6.0
Poloxamer 188         16
Poloxamer 407         205
Benzalkonium chloride 0.05
Water                 volume up to 1000 mL

The preparation method for the pharmaceutical composition is the same as that in Example 4 except that poloxamer 188 and poloxamer 407 are used instead of glycerol.

Stability Test

(1) Photostability test: In order to investigate the photostability of the compositions provided by the above examples and comparative example, all samples for illumination factor investigation were packaged according to commercial standard, placed in the illumination incubator MGC-100 under a condition of 4500Lx, sampled on Day 0, Day 5, and Day 10 respectively, and tested according to the key investigation items for stability. The investigation items for stability include: traits, particle size, particle size distribution, pH value, osmotic pressure, determination of the content of compound of formula I, and determination of the content of impurities. The test results are shown in Table 1 below.

(2) High-temperature stability test: In order to investigate the high-temperature stability of the compositions provided by the above examples and comparative example, all samples for high-temperature factor investigation were packaged according to commercial standard, placed in the 101-1A digital display electric drying incubator under a condition of 60° C., sampled on Day 0, Day 5, and Day 10 respectively, and tested according to the key investigation items for stability. The investigation items for stability include: traits, particle size, particle size distribution, pH value, osmotic pressure, determination of the content of compound of formula I, and determination of the content of impurities. The test results are shown in Table 1 below.

	TABLE 1
			Illumination test	High-temperature test
	Investigation		4500 Lx	60° C.
Prescription	items	Limit requirements	Day 0	Day 5	Day 10	Day 0	Day 5	Day 10
Example 1	Traits	It should be an off-	Comply	Comply	Comply	Comply	Comply	Comply
		white suspension	with the	with the	with the	with the	with the	with the
		liquid.	requirement	requirement	requirement	requirement	requirement	requirement
	pH value	It should be 6.0 to	7.04	7.07	7.03	7.04	7.05	7.00
		8.0.
	Particle size	No more than two	Comply	Comply	Comply	Comply	Comply	Comply
		particles larger than	with the	with the	with the	with the	with the	with the
		50 μm, and no	requirement	requirement	requirement	requirement	requirement	requirement
		detectable particles
		larger than 90 μm.
	Osmotic	Osmotic pressure	282	282	281	282	280	282
	pressure	molar concentration
		should be 270 to 330
		mOsmol/kg.
	Total	Total	5.49	5.53	5.81	5.49	5.10	5.21
	Impurities (%)	impurities should
		not exceed 8.0%.
	Content (%)	It should be 90.0 to	105.86	103.6	99.12	105.86	104.56	99.64
		110.0% of the
		labelled amount.
	Particle size	D10 (μm)	1.161	1.147	1.175	1.161	1.154	1.156
	distribution	D50 (μm)	3.150	3.065	3.081	3.150	3.080	3.094
		D90 (μm)	6.108	5.919	5.908	6.108	5.925	5.957
Example 3	Traits	It should be an off-	Comply	Comply	Comply	Comply	Comply	Comply
		white suspension	with the	with the	with the	with the	with the	with the
		liquid.	requirement	requirement	requirement	requirement	requirement	requirement
	pH value	It should be 6.0 to	6.96	6.95	6.91	6.96	6.95	6.69
		8.0.
	Particle size	No more than two	Comply	Comply	Comply	Comply	Comply	Comply
		particles larger than	with the	with the	with the	with the	with the	with the
		50 μm, and no	requirement	requirement	requirement	requirement	requirement	requirement
		detectable particles
		larger than 90 μm.
	Osmotic	Osmotic pressure	292	293	291	292	293	305
	pressure	molar concentration
		should be 270 to 330
		mosmol/kg.
	Total	Total	5.17	5.32	5.87	5.17	5.41	6.04
	Impurities (%)	impurities should
		not exceed 8.0%.
	Content (%)	It should be 90.0 to	105.94	104.65	102.84	105.94	105.50	101.58
		110.0% of the
		labelled amount.
	Particle size	D10 (μm)	1.116	1.099	1.103	1.116	1.085	1.079
	distribution	D50 (μm)	2.784	2.779	2.783	2.784	2.760	2.775
		D90 (μm)	5.433	5.449	5.443	5.433	5.434	5.450
Example 4	Traits	It should be an off-	Comply	Comply	Comply	Comply	Comply	Comply
		white suspension	with the	with the	with the	with the	with the	with the
		liquid.	requirement	requirement	requirement	requirement	requirement	requirement
	pH value	It should be 6.0 to	6.86	6.99	6.74	6.86	6.61	6.28
		8.0.
	Particle size	No more than two	Comply	Comply	Comply	Comply	Comply	Comply
		particles larger than	with the	with the	with the	with the	with the	with the
		50 μm, and no	requirement	requirement	requirement	requirement	requirement	requirement
		detectable particles
		larger than 90 μm.
	Osmotic	Osmotic pressure	290	290	288	290	287	290
	pressure	molar concentration
		should be 270 to 330
		mosmol/kg.
	Total	Total	5.79	6.20	6.41	5.79	5.39	5.44
	Impurities (%)	impurities should
		not exceed 8.0%.
	Content (%)	It should be 90.0 to	106.83	103.04	101.82	106.83	105.93	101.81
		110.0% of the
		labelled amount.
	Particle size	D10 (μm)	1.107	1.106	1.122	1.107	1.104	1.105
	distribution	D50 (μm)	2.941	2.855	2.893	2.941	2.873	2.861
		D90 (μm)	5.740	5.478	5.535	5.740	5.545	5.511
Comparative	Traits	It should be an off-	Comply	Comply	Comply	Comply	Comply	Comply
Example 1		white viscous liquid.	with the	with the	with the	with the	with the	with the
			requirement	requirement	requirement	requirement	requirement	requirement
	pH value	It should be 6.0 to	7.07	6.90	6.63	7.07	3.23	2.91
		8.0.
	Particle size	No more than two	Comply	Comply	Comply	Comply	Comply	Comply
		particles larger than	with the	with the	with the	with the	with the	with the
		50 μm, and no	requirement	requirement	requirement	requirement	requirement	requirement
		detectable particles
		larger than 90 μm.
	Total	Total	5.40	6.28	6.24	5.40	5.89	6.67
	Impurities (%)	impurities should
		not exceed 8.0%.
	Content (%)	It should be 90.0 to	101.74	102.17	101.76	101.74	101.98	100.68
		110.0% of the
		labelled amount.
	Particle size	D10 (μm)	1.172	1.181	1.170	1.174	1.168	1.171
	distribution	D50 (μm)	4.113	4.206	4.196	4.115	4.109	4.205
		D90 (μm)	8.077	8.117	8.098	8.126	8.119	8.129

It can be seen from the experimental results in Table 1 that after the pharmaceutical composition provided according to the present invention was placed under a condition of 4500Lx illumination or a condition of 60° C. high temperature for 10 days, the pH and osmotic pressure thereof remained stable, the relevant substances and contents had no obvious change. The pharmaceutical composition according to the present invention has more excellent stability in respect of exposure to light and high temperature than that provided in the comparative example, can be stored at room temperature, and is convenient for patients to use. At the same time, the pharmaceutical composition has a pH and osmotic pressure close to those in the intraocular environment, is uniform in particle size distribution, has a D₅₀ particle size not exceeding 3.5 μm, and thus can give the patients better comfort level.

In contrast, the pH value of the pharmaceutical composition obtained in comparative example 1 changed significantly under a condition of 4500Lx illumination or high temperature of 60° C., and the stability was poor. Moreover, the pharmaceutical composition obtained in comparative example 1 was a gel, and the osmotic pressure thereof cannot be measured and did not meet the requirements of the intraocular environment, and the particle sizes of D₅₀ and D₉₀ were larger, and the comfort levelwas poor.

Therapeutic Effect Test

Nine patients with floaters were selected and administrated with the pharmaceutical composition provided in Example 1 four times a day with 2 drops each time from the date of diagnosis, and the therapeutic effect on floaters of the patients observed on Day 15 and Day 30 are shown in Table 2 below:

TABLE 2
Patient
No.	Symptoms during the visit	15 days of medication	30 days of medication
1	Floaters: moderate vitreous	The floating black dots were	The black dots almost
	opacity, 5-6 floating black dots	shallower than before the	disappeared, and the visual
	in front of the eyes, floating	medication, the observation of the	quality such as contrast
	with the rotation of the eyeball,	white background such as ceilings	sensitivity was improved
	and the observation of the white	and walls was clearer than before the	significantly.
	background such as ceilings	medication, and the contrast
	and walls was affected.	sensitivity was improved.
2	Floaters: moderate vitreous	The floating black dots were reduced	The black dots almost
	opacity, 6-7 floating black dots	to 2-3, the floating objects in the	disappeared, the floating
	in front of the eyes, dust-like	anterior vitreous body were reduced,	objects in the anterior
	floating objects in the anterior	the observation of the white	vitreous body basically
	vitreous body can be seen under	background such as ceilings and	disappeared, and the visual
	the slit lamp, and the	walls was clearer than before the	quality such as contrast
	observation of the white	medication, and the contrast	sensitivity was improved
	background such as ceilings	sensitivity was improved.	significantly.
	and walls was affected.
3	Floaters: mild vitreous opacity,	The floating black dots were	The black dots
	3-4 floating black dots in front	shallower than before the	disappeared, and the visual
	of the eyes, and the observation	medication, and the observation of	quality such as contrast
	of the white background such	the white background such as	sensitivity was improved
	as ceilings and walls was	ceilings and walls was clearer than	significantly.
	affected.	before the medication, and the
		contrast sensitivity was improved.
4	Floaters: mild vitreous opacity,	The floating black dots were	The black dots
	2-3 floating black dots in front	significantly shallower than before	disappeared, the vision was
	of the eyes, and the observation	the medication, the observation of the	clearer, and the visual
	of the white background such	white background such as ceilings	quality such as contrast
	as ceilings and walls was	and walls was clearer than before the	sensitivity was improved
	affected.	medication, and the contrast	significantly.
		sensitivity was improved.
5	Floaters: moderate vitreous	The floating black dots were	The black dots almost
	opacity, 8-9 floating black dots	shallower than before the	disappeared, the floating
	in front of the eyes, floating	medication, and the number was	objects in the anterior
	with the rotation of the eyeball,	reduced to 3-4, the floating objects in	vitreous body basically
	dust-like floating objects in the	the anterior vitreous body were	disappeared, and the visual
	anterior vitreous body can be	reduced, the observation of the white	quality such as contrast
	seen under the slit lamp, and the	background such as ceilings and	sensitivity was improved
	observation of the white	walls was clearer than before the	significantly.
	background such as ceilings	medication, and the contrast
	and walls was blurred.	sensitivity was improved.
6	Floaters: moderate vitreous	The floating black dots and bands	The black dots and bands
	opacity, 7-8 floating black dots	were shallower than before the	almost disappeared, the
	in front of the eyes, 1 band of	medication, the observation of the	observation of the white
	transparent opacity, the	white background such as ceilings	background such as
	observation of the white	and walls was clearer than before the	ceilings and walls was not
	background such as ceilings	medication, and the contrast	affected, and the visual
	and walls was affected greatly,	sensitivity was improved.	quality such as contrast
	and there was visual		sensitivity was improved
	disturbance.		significantly.
7	Floaters: mild vitreous opacity,	The floating black dots were	The black dots almost
	4-5 floating black dots in front	shallower than before the	disappeared, the
	of the eyes, floating with the	medication, and the observation of	observation of the white
	rotation of the eyeballs, and the	the white background such as	background such as
	observation of the white	ceilings and walls was clearer than	ceilings and walls was not
	background such as ceilings	before the medication, and the	affected, and the visual
	and walls was affected.	contrast sensitivity was improved.	quality such as contrast
			sensitivity was improved
			significantly.
8	Floaters: moderate vitreous	The floating black dots and bands	The black dots
	opacity, 4-5 floating black dots	were shallower than before the	disappeared, the bands
	in front of the eyes, 1-2 bands	medication, the observation of the	almost disappeared, and
	of transparent opacity, and the	white background such as ceilings	the visual quality such as
	observation of the white	and walls was clearer than before the	contrast sensitivity was
	background such as ceilings	medication, and the contrast	improved significantly.
	and walls was affected greatly.	sensitivity was improved.
9	Floaters: mild vitreous opacity,	The floating black dots were	The black dots almost
	3-4 floating black dots in front	shallower than before the	disappeared, and the visual
	of the eyes, and the observation	medication, the observation of the	quality such as contrast
	of the white background such	white background such as ceilings	sensitivity was improved
	as ceilings and walls was	and walls was clearer than before the	significantly.
	affected or interfered.	medication, and the contrast
		sensitivity was improved.

It can be seen from the therapeutic effects shown in Table 2 that the pharmaceutical composition provided according to the present invention can make the black dots and bands in front of the eyes obviously shallow and/or less after about 15 days of medication, and improve the contrast sensitivity. About 30 days of medication, the pharmaceutical composition can make the black dots and bands in front of the eyes almost disappear, or even disappear completely, and the visual quality such as contrast sensitivity is significantly improved, and the floaters are basically cured, and there are no other side effects.

Although the present invention has been described in details with general description, specific embodiments and tests, some modifications or improvements which are obvious to those skilled in the art can be made on the basis of the present invention. Therefore, these modifications or improvements not deviating from the spirit of the present invention belong to the scope of protection claimed by the present invention.

Claims

1-16. (canceled)

17. A pharmaceutical composition, wherein the pharmaceutical composition comprises the following components: a compound of formula I, hydroxypropyl methylcellulose, benzalkonium chloride and a pH regulator;

18. The pharmaceutical composition according to claim 17, wherein the pharmaceutical composition comprises the components with the following parts by weight: 0.01˜4 parts of compound of formula I, 2˜12 parts of hydroxypropyl methylcellulose, 0.05˜0.06 parts of benzalkonium chloride and 1˜20 parts of pH regulator, and the pH of the pharmaceutical composition is 6 to 8.

19. The pharmaceutical composition according to claim 18, wherein the concentration of the compound of formula I in the pharmaceutical composition is 0.01˜4 mg/mL, and preferably 0.1 mg/mL, 0.2 mg/mL, 0.3 mg/mL, 0.4 mg/mL, 0.5 mg/mL, 1 mg/mL, 2 mg/mL, 3 mg/mL or 4 mg/mL.

20. The pharmaceutical composition according to claim 18, wherein the pH regulator is selected from one or a combination of at least two of the group consisting of sodium hydroxide, hydrochloric acid, sodium citrate, citric acid, boric acid, borax, sodium dihydrogen phosphate, disodium hydrogen phosphate, potassium dihydrogen phosphate and dipotassium hydrogen phosphate.

21. The pharmaceutical composition according to claim 17, wherein the pharmaceutical composition further comprises a solubilizer.

22. The pharmaceutical composition according to claim 21, wherein the parts by weight of the solubilizer in the pharmaceutical composition is 10˜50 parts.

23. The pharmaceutical composition according to claim 21, wherein the solubilizer is selected from one or a combination of at least two of the group consisting of polysorbate-80, glycerol, hydrogenated castor oil-RH40, polyethylene glycol 400, hydroxypropyl-β-cyclodextrin and poloxamer 188.

24. The pharmaceutical composition according to claim 17, wherein the pharmaceutical composition comprises the components with the following parts by weight: 2 parts of compound of formula I, 6 parts of hydroxypropyl methylcellulose, 16.5 parts of boric acid, 2 parts of borax and 0.05 parts of benzalkonium chloride; or2 parts of compound of formula I, 6 parts of hydroxypropyl methylcellulose, 40 parts of polysorbate-80, 16 parts of boric acid, 1.6 parts of borax and 0.05 parts of benzalkonium chloride; or2 parts of compound of formula I, 6 parts of hydroxypropyl methylcellulose, 10 parts of hydrogenated castor oil-RH40, 17 parts of boric acid, 1.7 parts of borax and 0.05 parts of benzalkonium chloride.

25. The pharmaceutical composition according to claim 17, wherein the particle size of the compound of formula I is <90 μm, preferably ≤50 μm, and/or the particle size distribution of the compound of formula I is D90≤7 μm and/or D50≤4 μm.

26. The pharmaceutical composition according to claim 17, wherein the dosage form of the pharmaceutical composition is a suspension, an emulsion or a gel, and preferably an emulsion.

27. A pharmaceutical composition, wherein the pharmaceutical composition comprises the components with the following parts by weight: 2 parts of compound of formula I, 6 parts of hydroxypropyl methylcellulose, 25 parts of glycerol and 0.05 parts of benzalkonium chloride; or2 parts of compound of formula I, 6 parts of hydroxypropyl methylcellulose, 10 parts of hydrogenated castor oil-RH40, 40 parts of polysorbate-80, 25 parts of glycerol, and 0.05 parts of benzalkonium chloride,

28. The pharmaceutical composition according to claim 27, wherein the particle size of the compound of formula I is <90 μm, preferably ≤50 μm, and/or the particle size distribution of the compound of formula I is D90≤7 μm and/or D50≤4 μm.

29. The pharmaceutical composition according to claim 27, wherein the dosage form of the pharmaceutical composition is a suspension, an emulsion or a gel, and preferably an emulsion.

30. A preparation method for the pharmaceutical composition according to claim 17, wherein the preparation method comprises: mixing evenly the compound of formula I, hydroxypropyl methylcellulose, benzalkonium chloride, the optional pH regulator and the optional solubilizer according to the prescription amount to obtain the pharmaceutical composition.

31. The preparation method according to claim 30, wherein the preparation method comprises the following steps: (1) dissolving hydroxypropyl methylcellulose with water for injection to obtain solution I;(2) dissolving the components other than hydroxypropyl methylcellulose and the compound of formula I in prescription amount with water for injection, then adding to the solution I, and mixing evenly to obtain solution II;(3) taking a prescription amount of the compound of formula I, adding to the solution II, and mixing evenly to obtain solution III; and(4) filling the solution III to full volume with water for injection to obtain the pharmaceutical composition.

32. A method for the prevention or treatment of cataracts or floaters, comprising administering the pharmaceutical composition according to claim 17 to a subject in need thereof.

33. A method for the prevention or treatment of cataracts or floaters, comprising administering the pharmaceutical composition according to claim 27 to a subject in need thereof.