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Tamsulosin hydrochloride capsules, USP are indicated for the treatment of the signs and symptoms of benign prostatic hyperplasia (BPH) [see Clinical Studies (14)]. Tamsulosin hydrochloride capsules, USP are not indicated for the treatment of hypertension.
Tamsulosin hydrochloride is an antagonist of alpha1A adrenoceptors in the prostate.
Tamsulosin hydrochloride is (-)-(R)-5-[2-[[2-(o-Ethoxyphenoxy) ethyl]amino]propyl]-2-methoxybenzenesulfonamide, monohydrochloride. Tamsulosin hydrochloride USP is a white or almost white crystalline powder that melts with decomposition at approximately 230°C. It is sparingly soluble in water and methanol, slightly soluble in glacial acetic acid and ethanol, and practically insoluble in ether.
The molecular formula of tamsulosin hydrochloride is C20H28N2O5S • HCl. The molecular weight of tamsulosin hydrochloride is 444.98. Its structural formula is:
Each tamsulosin hydrochloride capsule, USP* for oral administration contains tamsulosin hydrochloride 0.4 mg, and the following inactive ingredients: microcrystalline cellulose, magnesium stearate, methacrylic acid copolymer dispersion, talc, triethyl citrate, FD and C blue # 1, FD and C red # 40, FD and C yellow # 10, titanium dioxide, gelatin, shellac, dehydrated alcohol, isopropyl alcohol, butyl alcohol, propylene glycol, strong ammonia solution, black iron oxide and potassium hydroxide.
*USP dissolution test is pending.