Flomax (Tamsulosin Hcl) is used by men to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH). It does not shrink the prostate, but it works by relaxing the muscles in the prostate and the bladder. This helps to relieve symptoms of BPH such as difficulty in beginning the flow of urine, weak stream, and the need to urinate often or urgently (including during the middle of the night). Tamsulosin belongs to a class of drugs known as alpha blockers. Do not use this medication to treat high blood pressure.
Tamsulosin may cause a sudden drop in your blood pressure, which could lead to dizziness or fainting. This risk is higher when you first start taking this drug, after your doctor increases your dose, or if you restart treatment after you stop taking it. During these times, avoid situations where you may be injured if you faint.
Take this medication regularly to get the most benefit from it. To help you remember, take it at the same time each day. If you have not taken this drug for several days, contact your doctor to see if you need to be restarted at a lower dose. It may take up to 4 weeks before your symptoms improve. Tell your doctor if your condition does not improve or if it worsens.