Flomax (Tamsulosin) Drug Information

  • Why is this medication prescribed?

    Flomax (tamsulosin) is 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 (tamsulosin) is 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.

  • How should this medicine be used?

    Flomax (tamsulosin) comes as a capsule to take by mouth. It is usually taken once a day. Take Flomax (tamsulosin) 30 minutes after the same meal each day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take Flomax (tamsulosin) exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

    Swallow Flomax (tamsulosin) capsules whole; do not split, chew, crush, or open them.

    Your doctor will probably start you on a low dose of Flomax (tamsulosin) and may increase your dose after 2 to 4 weeks.

    Flomax (tamsulosin) may help control your condition, but it will not cure it. Continue to take Flomax (tamsulosin) even if you feel well. Do not stop taking Flomax (tamsulosin) without talking to your doctor.

  • Other uses for this medicine

    This medication may be prescribed for other uses. Ask your doctor or pharmacist for more information.

  • What special precautions should I follow?

    Before taking Flomax (tamsulosin):

    • tell your doctor and pharmacist if you are allergic to Flomax (tamsulosin), sulfa medications, or any other medications.
    • tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements and herbal products you are taking or plan to take. Be sure to mention any of the following: other alpha blocker medications such as alfuzosin (Uroxatral), doxazosin (Cardura), prazosin (Minipress), and terazosin (Hytrin); anticoagulants ('blood thinners') such as warfarin (Coumadin); cimetidine (Tagamet); and medications for erectile dysfunction (ED) such as sildenafil (Viagra), tadalafil (Cialis), or vardenafil (Levitra); Your doctor may need to change the doses of your medications or monitor you more carefully for side effects.
    • tell your doctor if you have or have ever had prostate cancer or liver or kidney disease.
    • you should know that Flomax (tamsulosin) is only for use in men. Women should not take Flomax (tamsulosin), especially if they are pregnant or could become pregnant or are breast-feeding. If a pregnant woman takes Flomax (tamsulosin), she should call her doctor.
    • if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking Flomax (tamsulosin). If you need to have eye surgery at any time during or after your treatment, be sure to tell your doctor that you are taking or have taken Flomax (tamsulosin).
    • you should know that this medication may make you drowsy or dizzy.Do not drive a car, operate machinery, or perform dangerous tasks until you know how this medication affects you.
    • you should know that Flomax (tamsulosin) may cause dizziness, lightheadedness, a spinning sensation, and fainting, especially when you get up too quickly from a lying position. This is more common when you first start taking Flomax (tamsulosin) or after your dose is increased. To help avoid this problem, get out of bed slowly, resting your feet on the floor for a few minutes before standing up. Call your doctor if these symptoms are severe or do not go away.
  • What should I do if I forget a dose?

    Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one. If you interrupt your treatment for several days or longer, call your doctor before restarting the medication, especially if you take more than one capsule of Flomax (tamsulosin) a day.

  • What side effects can this medication cause?

    Flomax (tamsulosin) may cause side effects. Tell your doctor if any of these symptoms or those in the SPECIAL PRECAUTIONS section are severe or do not go away:

    • sleepiness
    • difficulty falling asleep or staying asleep
    • weakness
    • back pain
    • diarrhea
    • runny or stuffy nose
    • pain or pressure in the face
    • sore throat, cough, fever, chills, or other signs of infection
    • blurred vision
    • difficulty ejaculating

    Some side effects can be serious. If you experience any of the following symptoms, call your doctor immediately:

    • painful erection of the penis that lasts for hours
    • rash
    • itching
    • hives
    • swelling of the eyes, face, tongue, lips, throat, arms, hands, feet, ankles, or lower legs
  • What storage conditions are needed for this medicine?

    Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.

  • In case of emergency/overdose

    In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

    Symptoms of overdose may include:

    • dizziness
    • fainting
    • blurred vision
    • upset stomach
    • headache
  • What other information should I know?

    Keep all appointments with your doctor.

    Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.

    It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.

  • Brand Names

    • Flomax®