Tamsulosin

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Tamsulosin HCL

Tamsulosin Hcl drug image

Brand Flomax

     Form Oral Capsule

     Drug Type Benign Prostatic Hypertrophy/Micturition Agents

 

Men use Tamsulosin to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH). It does not shrink the prostate, but it works by relaxing the prostate and bladder muscles.

 

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Drug Information

Men use Tamsulosin to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH). It does not shrink the prostate, but it works by relaxing the prostate and bladder muscles. This helps to relieve symptoms of BPH, such as difficulty in beginning the flow of urine, a weak stream, and the need to urinate often or urgently (including during the middle of the night). Tamsulosin belongs to a class of drugs known as alpha-blockers. Do not use this medication to treat high blood pressure.

Read the Patient Information Leaflet if available from your pharmacist before you start taking this medication and each time you get a refill. If you have any questions, ask your doctor or pharmacist. Take this medication by mouth as directed by your doctor, usually once daily, 30 minutes after the same meal each day. Swallow this medication whole. Do not crush, chew, or open the capsules. The dosage is based on your medical condition and response to treatment. Tamsulosin may cause a sudden drop in your blood pressure, which could lead to dizziness or fainting. This risk is higher when you first start taking this drug, after your doctor increases your dose, or if you restart treatment after you stop taking it. During these times, avoid situations where you may be injured if you faint. Take this medication regularly to get the most benefit from it.

To help you remember, take it at the same time each day. If you have not taken this drug for several days, contact your doctor to see if you need to be restarted at a lower dose. It may take up to 4 weeks before your symptoms improve. Tell your doctor if your condition does not improve or if it worsens.

Dizziness, lightheadedness, drowsiness, runny/stuffy nose, or ejaculation problems may occur. Tell your doctor or pharmacist promptly if any of these effects last or get worse. To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.

Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if you have any serious side effects, including fainting. Rarely, males may have a painful or prolonged erection lasting four or more hours. If this occurs, stop using this drug and get medical help right away, or permanent problems could occur.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, or trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.

Before taking tamsulosin, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist about your medical history, especially of: low blood pressure and certain eye problems (cataracts, glaucoma). This drug may make you dizzy or drowsy. Alcohol or marijuana (cannabis) can make you more dizzy or drowsy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Limit alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis). Before having surgery (including cataract/glaucoma eye surgery), tell your doctor or dentist if you are taking or have ever taken this medication and about all the other products you use (including prescription drugs, nonprescription drugs, and herbal products). Older adults may be more sensitive to the side effects of this drug, especially dizziness and low blood pressure when getting up from a sitting or lying position. These side effects can increase the risk of falling.

During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor. It is unknown if this medication passes into breast milk. Consult your doctor before breastfeeding.

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all your products (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist.

Do not start, stop, or change the dosage of any medicines without your doctor's approval. Some products that may interact with this drug include other alpha-blocker drugs (such as prazosin and terazosin). If you are also taking a drug to treat erectile dysfunction-ED or pulmonary hypertension (such as sildenafil or tadalafil), your blood pressure may get too low, which can lead to dizziness or fainting. Your doctor may need to adjust your medications to minimize this risk. Other medications can affect the removal of tamsulosin from your body, which may affect how tamsulosin works. Examples include azole antifungals (such as itraconazole and ketoconazole), clarithromycin, cobicistat, and HIV protease inhibitors (such as lopinavir, ritonavir), mifepristone, ribociclib, among others.

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The information provided on this page is updated periodically. Please use our Drug Search Tool for the latest information and updates about this drug. The information on this site is not intended to take the place of your doctor or other healthcare professionals. It is a resource to help you make the best decisions and get the most from the medical services available to you. A licensed physician should be consulted to diagnose and treat all medical conditions.