Flomax ( Tamsulosin Hydrochloride ) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Tamsulosin hydrochloride capsules are contraindicated in patients known to be hypersensitive to tamsulosin hydrochloride or any component of tamsulosin hydrochloride capsules. Tamsulosin Brand names: Contiflo XL, Faramsil MR, Flomaxtra XL, Pamsvax XL, Tabphyn MR Find out how tamsulosin treats symptoms of an enlarged prostate and kidney stones, and how to take it. Tamsulosin is an alpha blocker used to treat benign prostatic hyperplasia (BPH), a condition that affects the prostate and bladder. Learn about its dosage forms, common side effects, serious warnings, and interactions with other medicines.