Synergistic herbal ophthalmic formulation for lowering the intra ocular pressure in case of glaucoma
The present invention relates to a synergistic herbal composition for lowering the intra ocular pressure in different types of glaucoma and process for the preparation of the same in pharmaceutically acceptable dosage forms.
1. An herbal ophthalmic composition for lowering intraocular pressure comprising:
(i) an Ocimum species extract, in an amount of 0.1 to 1.0% by weight;
(ii) a Curcuma species extract, in an amount of 0.01 to 0.5% by weight; and
(iii) one or both of a Solanum nigrum extract, in an amount of 0.1 to 0.75% by weight, and an Areca catechu extract, in an amount of 0.1 to 1.0% by weight;
wherein the composition optionally comprises one or more pharmaceutically acceptable excipients and/or carriers, and wherein the composition is effective in lowering intraocular pressure in a subject having glaucoma.
2. The herbal ophthalmic composition as claimed in claim 1 , wherein the Ocimum species is selected from the group consisting of Ocimum basilicum, Ocimum canum, Ocimum kilimandscaricum, Ocimum sanctum, Ocimum viride and the Curcuma species is selected from the group consisting of Curcuma longa, Curcumavaleton, Curcuma amad, Curcuma aromatica Salisb.
3. The herbal ophthalmic composition as claimed in claim 1 , wherein the amount of the Ocimum species extract is in an amount of 0.50% by weight; the amount of the Curcuma species extract is in an amount of 0.1% by weight; the amount of the Solanum nigrum extract is in an amount of 0.25% by weight; and the amount of the Areca catechu extract is in an amount of 0.25% by weight.
4. The herbal ophthalmic composition as claimed in claim 1 or 2 , wherein the composition comprises Ocimum basilicum extract, Curcuma longa extract and Solanum nigrum extract.
5. The herbal ophthalmic composition as claimed in claim 1 or 2 , wherein the composition comprises Ocimum basilicum, Curcuma longa and Areca catechu.
6. The herbal ophthalmic composition as claimed in claim 1 , wherein the pharmaceutically acceptable excipients are selected from the group consisting of a solubility enhancing agent, a viscosity increasing agent, an antioxidant, a buffering agent, an osmolarity adjusting agent and a preservative.
7. The herbal ophthalmic composition as claimed in claim 1 , wherein the composition is in the form of an eye drop, ointment, cream or gel.
8. The herbal ophthalmic composition of claim 6 , wherein the solubility enhancing agent is polysorbate, cyclodextrin, a cyclodextrin derivative or Cremophore RH 40.
9. The herbal ophthalmic composition of claim 6 , wherein the viscosity increasing agent is hydroxypropylmethylcellulose, a cellulose derivative, polyvinyl alcohol, povidone, carbopol or carageenin.
10. The herbal ophthalmic composition of claim 6 , wherein the antioxidant is citric acid, EDTA, a salt of EDTA or sodium metabisulphite.
11. The herbal ophthalmic composition of claim 6 , wherein the buffering agent is citrate, borate, phosphate or citro phosphate.
12. The herbal ophthalmic composition of claim 6 , wherein the osmolarity adjusting agent is sodium chloride, mannitol or glycerol.
13. The herbal ophthalmic composition of claim 6 , wherein the preservative is benzalkonium chloride or a salt thereof, sorbic acid or a salt thereof, methyl paraben or a salt thereof or propyl paraben or a salt thereof.
14. The herbal ophthalmic composition as claimed in claim 1 , wherein the composition comprises Ocimum basilicum extract in an amount of 0.50% by weight, Curcuma longa extract in an amount of 0.1% by weight, Solanum nigrum extract in an amount of 0.25% by weight and Areca catechu extract in an amount of 0.25% by weight.
15. The herbal ophthalmic composition as claimed in claim 1 , wherein the composition comprises Ocimum basilicum extract in an amount of 0.50% by weight, Curcuma longa in an amount of 0.1% by weight and Solanum nigrum extract in an amount of 0.25% by weight.
16. The herbal ophthalmic composition as claimed in claim 1 , wherein the composition comprises Ocimum basilicum extract in an amount of 0.50% by weight, Curcuma longa in an amount of 0.1% by weight and Areca catechu extract in an amount of 0.5% by weight.
17. A process for preparing the herbal ophthalmic composition as claimed in claim 1 comprising:
(i) coarsely grinding each of the herbs and extracting each of the ground herbs with a solvent selected from the group consisting of water, alcohol, acetone, ethyl acetate, petroleum ether, chloroform, and mixtures thereof;
(ii) optionally concentrating each of the extracts obtained in step (i) under vacuum, and forming each of the concentrated extracts into a paste or a dry powder; and
(iii) combining effective amounts of the paste and/or dry powder of each extract to obtain a mixture, and formulating the mixture into an eye drop, ointment, cream, or gel, wherein the eye drop, ointment, cream, or gel formulation is the herbal ophthalmic composition.