Tamsulosin is in a group of drugs called alpha-adrenergic (AL-fa ad-ren-ER-jik) blockers. Tamsulosin relaxes your veins and arteries so that blood can more easily pass through them. It also relaxes the muscles in the prostate and bladder neck, making it easier to urinate.
Tamsulosin is used to improve urination in men with benign prostatic hyperplasia (enlarged prostate).
Tamsulosin may also be used for other purposes not listed in this medication guide.
What is the most important information I should know about tamsulosin?
Tamsulosin can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert. You may feel dizzy when getting up from a sitting or lying position. Avoid standing up too quickly to keep from falling. Avoid drinking alcohol. It may increase dizziness caused by tamsulosin.
Before taking tamsulosin, tell your doctor if you are allergic to sulfa drugs. You may also be allergic to tamsulosin.
Tamsulosin can affect the pupils of your eyes during cataract surgery. If you have cataract surgery during your treatment with tamsulosin, tell the surgeon ahead of time that you are using this medication. Do not stop using tamsulosin before surgery unless your surgeon tells you to.
Stop using tamsulosin and call your doctor at once if you feel like you might pass out, or if you have an erection of your penis that is painful or lasts longer than 4 hours.Tamsulosin should not be used by women or children.
How should I take tamsulosin?
Take tamsulosin exactly as your doctor has prescribed it for you. Do not use more of the medication than recommended. Do not take tamsulosin for longer than your doctor has prescribed. Follow the directions on your prescription label.
Your doctor may occasionally change your dose to make sure you get the best results from this medication.
Take each dose with a full glass of water. Swallow the tamsulosin capsule whole. Do not crush, chew, or open the capsule. Tamsulosin is usually taken once a day, approximately 30 minutes after a meal. Try to take this medication at the same time each day. If you stop taking tamsulosin for several days in a row, call your doctor before starting the medication again. You may need to restart at a different dose.To be sure this medication is helping your condition, your doctor will need to check you on a regular basis. Do not miss any scheduled appointments.
Store this medication at room temperature away from moisture and heat.
What happens if I miss a dose?
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at the next regularly scheduled time. Do not take extra medicine to make up the missed dose.
If you miss your doses for several days in a row, contact your doctor before restarting the medication. You may need a lower dose.
What happens if I overdose?
Seek emergency medical attention if you think you have used too much of this medicine.
Overdose symptoms may include a fast heartbeat, cold or clammy skin, severe headache, feeling light-headed, or fainting.
What should I avoid while taking tamsulosin?
Tamsulosin can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
Avoid getting up too fast from a sitting or lying position, or you may feel dizzy. Get up slowly and steady yourself to prevent a fall.
Avoid drinking alcohol. It may increase dizziness caused by tamsulosin.Tamsulosin side effects
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using tamsulosin and call your doctor at once if you have any of these serious side effects:
- penis erection that is painful or lasts 4 hours or longer;
- severe dizziness; or
- fainting.
Less serious side effects may include:
- mild dizziness or drowsiness;
- sleep problems (insomnia);
- abnormal ejaculation, decreased sex drive; or
- runny or stuffy nose, sore throat.
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.
What other drugs will affect tamsulosin?
Before taking tamsulosin, tell your doctor if you use any of the following drugs:
- cimetidine (Tagamet);
- cyclosporine (Gengraf, Neoral, Sandimmune);
- metronidazole (Flagyl, Protostat);
- warfarin (Coumadin);
- antibiotics such as azithromycin (Zithromax), ciprofloxacin (Cipro), clarithromycin (Biaxin), erythromycin (E-Mycin, E.E.S., Ery-Tab, Erythrocin), itraconazole (Sporanox), or ketoconazole (Nizoral);
- antidepressants such as citalopram (Celexa), escitalopram (Lexapro), fluoxetine (Prozac, Sarafem), fluvoxamine (Luvox), paroxetine (Paxil), or sertraline (Zoloft);
- heart or blood pressure medication such as diltiazem (Cardizem, Dilacor, Tiazac) or verapamil (Calan, Covera, Isoptin, Verelan); or
- HIV /AIDS medicine such as indinavir (Crixivan), nelfinavir (Viracept), ritonavir (Norvir), or saquinavir (Invirase, Fortovase).
This list is not complete and there may be other drugs that can interact with tamsulosin. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.
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