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Claims for Patent: 5,792,753

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Claims for Patent: 5,792,753

Title: Compositions comprising hyaluronic acid and prostaglandin-synthesis-inhibiting drugs
Abstract:A topically administrable pharmaceutical composition is disclosed which comprises a therapeutically effective amount of a drug which inhibits prostaglandin synthesis, and an amount of a form of hyaluronic acid sufficient to transport the composition through the skin into the epidermis or dermis where the composition remains until discharged via the lymphatic system, wherein (a) the drug is 1-5% by weight of the composition, and (b) the form of hyaluronic acid is 1-3% by weight of the composition, has a molecular weight greater than about 150,000 daltons and less than 750,000 daltons, and is selected from the group consisting of hyaluronic acid and salts thereof.
Inventor(s): Falk; Rudolf Edgar (Toronto, CA), Asculai; Samuel Simon (Toronto, CA)
Assignee: Hyal Pharmaceutical Corporation (Mississauga, CA)
Application Number:08/018,508
Patent Claims: 1. A topically administrable pharmaceutical composition comprising a therapeutically effective amount of a drug which inhibits prostaglandin synthesis, and an amount of a form of hyaluronic acid sufficient to transport the composition through the skin into the epidermis or dermis where the composition remains until discharged via the lymphatic system, wherein

(a) the drug is 1-5% by weight of the composition, and

(b) the form of hyaluronic acid is 1-3% by weight of the composition, has a molecular weight greater than about 150,000 daltons and less than 750,000 daltons, and is selected from the group consisting of hyaluronic acid and salts thereof.

2. The composition of claim 1, wherein the drug is 3% by weight of the composition, and the form of hyaluronic acid is about 2.5% by weight of the composition.

3. The composition of claim 1 or 2 which further comprises a solubilizer for the drug.

4. The composition of claim 1 wherein the drug is a non-steroidal anti-inflammatory drug (NSAID).

5. The composition of claim 1 wherein the drug is an anti-cancer drug.

6. The composition of claim 1 wherein the drug is novantrone.

7. The composition of claim 4 wherein the NSAID is selected from the group consisting of diclofenac, diclofenac sodium, indomethacin, naproxen, (.+-.) tromethamine salt of ketrolac, ibuprofen, piroxicam, propionic acid derivatives, acetylsalicylic acid, and flunixin.

8. The composition of claim 4 which further comprises a pharmaceutical excipient suitable for topical administration, wherein the NSAID is about 3% by weight of the composition, and the form of hyaluronic acid is about 2.5% by weight of the composition.

9. The composition of claim 8 wherein the NSAID is diclofenac sodium.

10. The composition of claim 9 wherein the excipient comprises a solubilizer for the drug.

11. The composition of claim 1 wherein the form of hyaluronic acid has a molecular weight greater than about 600,000 daltons and less than 750,000 daltons.

12. The composition of claim 1 in the form of a gel.

13. The composition of claim 1 in the form of a cream.

14. The composition of claim 1 in the form of a lotion.

15. The composition of claim 1 wherein the form of hyaluronic acid is sodium hyaluronate.

16. The composition of claim 7 wherein the NSAID is diclofenac sodium.
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