Flomax

Generic name: Tamsulosin
Drug class: Alpha-adrenoreceptor antagonists

Usage of Flomax

Flomax (tamsulosin) belongs to in a class of medications called alpha blockers. It works by relaxing the muscles in the prostate and bladder so that urine can flow easily.

Flomax capsules are used in men to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia or BPH) which include difficulty urinating (hesitation, dribbling, weak stream, and incomplete bladder emptying), painful urination, and urinary frequency and urgency.

Flomax capsules are not approved for use in women or children.

Flomax side effects

Get emergency medical help if you have signs of an allergic reaction to Flomax (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning eyes, skin pain, red or purple skin rash with blistering and peeling).

Tamsulosin may lower your blood pressure and may cause dizziness or fainting, especially when you first start taking it or your dose changes.

Tamsulosin may cause serious side effects. Stop using Flomax and call your doctor at once if you have:

a light-headed feeling, like you might pass out; or

a painful erection that lasts 4 hours or longer.

Common Flomax side effects may include:

abnormal ejaculation, decreased amount of semen;

dizziness, drowsiness, weakness;

runny or stuffy nose, sore throat, cough;

back pain, chest pain, headache;

nausea, diarrhea;

tooth problems;

blurred vision;

sleep problems (insomnia); or

decreased interest in sex.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Before taking Flomax

You should not use Flomax if you are allergic to tamsulosin.

To make sure this medicine is safe for you, tell your doctor if you have ever had:

prostate cancer;

low blood pressure;

an allergy to sulfa drugs; or

liver or kidney disease.

Tamsulosin can affect your pupils. If you have cataract surgery, tell the surgeon you use this medicine.

Ask your doctor about prostate cancer screening before and while taking this medicine.

Flomax capsules are not approved for use in women.

Relate drugs

How to use Flomax

Usual Adult Dose for Benign Prostatic Hyperplasia:

0.4 mg orally once a day; the dose may be increased to 0.8 mg orally once a day in patients who fail to respond to 0.4 mg once a day within 2 to 4 weeks Comments: -This drug should be administered approximately one-half hour following the same meal each day. Use: Benign prostatic hyperplasia (BPH)

Warnings

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 this medicine 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 this medicine. 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.

What other drugs will affect Flomax

Sometimes it is not safe to use certain medicines at the same time. Some drugs can affect your blood levels of other drugs you use, which may increase side effects or make the medicines less effective.

Tell your doctor about all your current medicines. Many drugs can affect tamsulosin, especially:

cimetidine;

medicine to treat impotence or pulmonary arterial hypertension--avanafil (Stendra), sildenafil (Viagra, Revatio), tadalafil (Adcirca, Cialis), or vardenafil (Levitra, Staxyn); or

drugs to treat high blood pressure or a prostate disorder--alfuzosin, doxazosin, prazosin, terazosin, silodosin.

This list is not complete and many Other drugs may interact with tamsulosin. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.

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