Flomax (tamsulosin) is an alpha-blocker that relaxes the muscles in the prostate and bladder neck, making it easier to urinate. Flomax is used to improve urination in men with benign prostatic hyperplasia (enlarged prostate). Flomax is not approved for use in women or children.
You should not use Flomax if you are allergic to tamsulosin. Do not take tamsulosin with other similar medicines such as alfuzosin (Uroxatral), doxazosin (Cardura), prazosin (Minipress), silodosin (Rapaflo), or terazosin (Hytrin).
Flomax may cause dizziness or fainting, especially when you first start taking it or when you start taking it again. Be careful if you drive or do anything that requires you to be alert. Avoid standing for long periods of time or becoming overheated during exercise and in hot weather. Avoid getting up too fast from a sitting or lying position, or you may feel dizzy.
If you stop taking Flomax for any reason, call your doctor before you start taking it again. You may need a dose adjustment.
Tamsulosin can affect your pupils during cataract surgery. Tell your eye surgeon ahead of time that you are using this medication. Do not stop using Flomax before surgery unless your surgeon tells you to.
There are many other drugs that can interact with tamsulosin. Tell your doctor about all medications you use.
Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.