Tamsulosin

Urinary and men's health

Also known as Flomax

Tamsulosin treats the urinary symptoms of an enlarged prostate — the weak stream, the constant urge, the three-a.m. trips. It works by relaxing the muscles around the prostate and bladder opening so urine flows more easily. One honest thing to know: it doesn't shrink the prostate, it just relaxes it, so it helps symptoms without changing the gland itself.

How to take it

When

Once a day, about 30 minutes after the same meal each day.

Food

Taking it after the same meal daily keeps the level steady and cuts dizziness.

Avoid

Standing up fast, especially the first few doses — dizziness on standing is common early on.

Good to know

Having cataract or any eye surgery? Mention this medicine to your eye surgeon first.

Missed a dose?

Take it as soon as you remember that day, or skip it if it's nearly time for the next one. If you've missed several days, call your doctor before restarting. Never double up.

Common side effects

Dizziness, especially when standing up
Runny or stuffy nose
Headache
Abnormal ejaculation
Feeling weak or drowsy

Call a doctor if

Fainting or feeling like you're about to pass out — sit or lie down and get help
A painful erection lasting more than 4 hours — this is an emergency
Signs of a serious allergic reaction: swelling of face or throat, trouble breathing — get help now
Severe rash or peeling skin — stop and call the doctor

Educational only. This summary is drawn from public FDA labeling and MedlinePlus and simplified for readability. Your prescription label and your pharmacist always come first — doses and instructions vary from person to person.