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Dutasteride and tamsulosin

Generic name: dutasteride and tamsulosin

Brand names: Jalyn

Last updated November 2, 2026 0 views
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What is dutasteride and tamsulosin?

Dutasteride and tamsulosin is a combination medicine used to treat benign prostatic hyperplasia (BPH) in men who have an enlarged prostate.

Dutasteride and tamsulosin may also be used for reasons not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

How should I take dutasteride and tamsulosin?

Follow all instructions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Take dutasteride and tamsulosin 30 minutes after a meal, at the same time each day.

Swallow the capsule whole and do not crush, chew, break, or open it.

You will need medical tests to check your prostate specific antigen (PSA).

Store at room temperature away from moisture and heat.

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Warnings

dutasteride and tamsulosin should never be handled or taken by a woman, a child, or a teenager.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

You should not use this medicine if you are allergic to dutasteride, finasteride, or tamsulosin.

You should not take this medicine while you are taking tamsulosin (Flomax) or similar medicines, such as alfuzosin, doxazosin, prazosin, silodosin, or terazosin.

Dutasteride and tamsulosin should never be taken by a woman, a child, or a teenager. Dutasteride can be absorbed through the skin, and women or children should not be allowed to handle dutasteride and tamsulosin capsules.

This medicine is not for use by women. This medicine can cause birth defects. The capsules should not be handled by a woman who is pregnant or who may become pregnant.

If a woman accidentally comes into contact with this medication from a leaking capsule, wash the area with soap and water right away.

Tell your doctor if you have ever had:

  • high or low blood pressure;
  • liver or kidney disease;
  • prostate cancer; or
  • an allergy to sulfa drugs.

Using this medicine may increase your risk of developing prostate cancer. Ask your doctor about this risk.

Dutasteride and tamsulosin can affect your pupils. If you need eye surgery, tell the surgeon about your use of this medicine, even if you no longer take it.

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Dutasteride and tamsulosin side effects

Get emergency medical help if you have signs of an allergic reaction (hives, difficulty 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).

Dutasteride and tamsulosin may cause serious side effects. Stop using dutasteride and tamsulosin and call your doctor right away if you have:

  • a light-headed feeling, like you might faint; or
  • a painful erection that lasts 4 hours or longer.

Common side effects of dutasteride and tamsulosin may include:

  • decreased libido (sex drive);
  • less semen released during sex;
  • impotence (difficulty getting or keeping an erection);
  • breast tenderness or enlargement;
  • dizziness; or
  • runny nose.

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

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Dutasteride and tamsulosin dosing information

Usual Adult Dose for Benign Prostatic Hyperplasia:

Dutasteride 0.5 mg-Tamsulosin 0.4 mg orally once a day approximately 30 minutes after the same meal each dayUse: Treatment of symptomatic benign prostatic hyperplasia (BPH) in men with an enlarged prostate.

What happens if I miss a dose?

Take your dose as soon as you can, but only within 30 minutes after a meal. If it is almost time for your next dose, skip the missed dose. Do not take two doses at once.

Call your doctor if you miss your doses for several days in a row.

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Avoid taking medicines for erectile dysfunction (sildenafil, avanafil, Viagra, Cialis, and others).

Do not donate blood while taking dutasteride and tamsulosin and for at least 6 months after your last dose. Dutasteride could cause birth defects if a pregnant woman receives a transfusion with blood that contains this medicine.

Avoid getting up too fast from a sitting or lying position, or you may feel dizzy.

Avoid driving or doing hazardous activities until you know how this medicine will affect you. Your reactions could be impaired.

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What other drugs will affect dutasteride and tamsulosin?

Sometimes, it is not safe to use certain medications together. Some drugs can change the levels of other drugs in your blood, which may increase side effects or make the medications less effective.

Other drugs may affect dutasteride and tamsulosin, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all other medicines you are using.

This section was rewritten for readability and reviewed for meaning.

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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