Treatment of gynecomastia with 4-hydroxy tamoxifen
The present invention provides methods for treating and preventing gynecomastia by administering 4-hydroxy tamoxifen to a patient. When percutaneously administered to a patient's breasts, 4-hydroxy tamoxifen concentrates locally, and exerts an anti-estrogenic effect. In patients with gynecomastia, this reduces the effective estrogen-androgen ratio in the breast tissue, thereby reducing ductal proliferation, epithelial and stromal hyperplasia, and pain. In patients at risk for developing gynecomastia, 4-hydroxy tamoxifen's anti-estrogenic effect prevents tissue proliferation and its accompanying pain.
1. A method of treating a male patient suffering from gynecomastia, comprising percutaneously administering an effective amount of 4-hydroxy tamoxifen to said patient, wherein said 4-hydroxy tamoxifen is in a vehicle comprising isopropyl myristate.
2. A method according to claim 1 , wherein about 0.25 to 2.0 mg/breast of said 4-hydroxy tamoxifen is administered to said patient per day.
3. A method according to claim 1 , wherein about 0.5 to 1.0 mg/breast of said 4-hydroxy tamoxifen is administered to said patient per day.
4. A method according to claim 1 , wherein about 0.25 mg/breast of said 4-hydroxy tamoxifen is administered to said patient per day.
5. A method according to claim 1 , wherein about 0.5 mg/breast of said 4-hydroxy tamoxifen is administered to said patient per day.
6. A method according to claim 1 , wherein about 0.75 mg/breast of said 4-hydroxy tamoxifen is administered to said patient per day.
7. A method according to claim 1 , wherein about 1.0 mg/breast of said 4-hydroxy tamoxifen is administered to said patient per day.
8. A method according to claim 1 , wherein said 4-hydroxy tamoxifen is formulated in a hydroalcoholic gel.
9. A method according to claim 8 , wherein said hydroalcoholic gel comprises ethyl alcohol, isopropyl myristate, and hydroxypropylcellulose.
10. A method according to claim 1 , wherein said 4-hydroxy tamoxifen is formulated in an alcoholic solution.
11. A method according to claim 8 , wherein said hydroalcoholic gel comprises isopropyl myristate, an aqueous vehicle, an alcoholic vehicle and a gelling agent.
12. A method according to claim 11 , wherein said hydroalcoholic gel comprises:
a) about 0.01% to 0.25% by weight of 4-hydroxy tamoxifen,
b) about 0.5% to 2% by weight of isopropyl myristate,
c) about 65% to 75% by weight of absolute alcohol,
d) about 20% to 35% by weight of aqueous vehicle,
e) about 0.5% to 5% by weight of gelling agent,
wherein the percentage of components are weight to weight of the hydroalcoholic gel.
13. A method according to claim 12 , wherein said 4-hydroxy tamoxifen constitutes about 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, or 0.10% by weight of the hydroalcoholic gel.
14. A method according to claim 12 , wherein said 4-hydroxy tamoxifen constitutes about 0.11%, 0.12%, 0.13%, 0.14%, 0.15%, 0.16%, 0.17%, 0.18%, 0.19%, 0.2%, 0.21%, 0.22%, 0.23%, 0.24%, or 0.25% by weight of the hydroalcoholic gel.
15. A method according to claim 12 , wherein said isopropyl myristate constitutes about 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9% or 2.0% by weight of the hydroalcoholic gel.
16. A method according to claim 12 , wherein said alcohol is ethanol or isopropanol, and constitutes in absolute form about 62% to 75% by weight of the hydroalcoholic gel.
17. A method according to claim 12 , wherein said aqueous vehicle is a phosphate buffered solution, and constitutes about 25% to 35% by weight of the hydroalcoholic gel.
18. A method according to claim 12 , wherein said gelling agent is selected from the group consisting of polyacrylic acids, hydroxypropylcellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, and carboxymethyl cellulose, and constitutes about 0.5% to 5% by weight of the hydroalcoholic gel.
19. A method according to claim 12 , wherein said hydroalcoholic gel further comprises a neutralizing agent selected from the group consisting of sodium hydroxide, ammonium hydroxide, potassium hydroxide, arginine, aminomethylpropanol, trolamine and tromethamine, which neutralizing agent constitutes about 0.1% to 5% by weight of the hydroalcoholic gel.
20. A method according to claim 12 , wherein said hydroalcoholic gel is packaged in a unit dose packet or in a multiple dose container with a metered pump.