SIDE EFFECTS: Dizziness, lightheadedness, drowsiness, runny/stuffy nose, sexual problems (such as decreased sexual interest/ability, ejaculation problems, decrease in the amount of semen/sperm), increased breast size, or breast tenderness may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she 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 immediately if this rare but serious side effect occurs: fainting.

Rarely, males may have a painful or prolonged erection lasting 4 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, 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.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Read the Jalyn (dutasteride and tamsulosin hydrochloride capsules) Side Effects Center for a complete guide to possible side effects »

PRECAUTIONS: Before taking this product, tell your doctor or pharmacist if you are allergic to dutasteride or tamsulosin; or to finasteride; 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 your medical history.

This drug may make you dizzy or drowsy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.

To reduce the risk of dizziness, lightheadedness, or fainting, get up slowly when rising from a sitting or lying position, especially when you first start taking this drug. If dizziness occurs, sit or lie down until you feel better. Also, when you first start taking this drug, avoid situations where you may be injured if you faint.

Before having surgery (including cataract eye surgery), tell your doctor or dentist that you are taking this medication and about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

Do not donate blood while you are taking this medication and for at least 6 months after you stop taking it. This will prevent the possibility of your blood being given to a pregnant woman.

This medication should not be used in women. This medication must not be used during pregnancy. It may harm an unborn baby. If you become pregnant or think you may be pregnant, tell your doctor immediately.

It is unknown if this medication passes into breast milk. However, this medication should not be used in women.