Get emergency medical help if you have signs of an allergic reaction (hives, difficult 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).
Common side effects may include:
decreased libido (sex drive);
decreased amount of semen released during sex;
impotence (trouble getting or keeping an erection); or
breast tenderness or enlargement.
The sexual side effects of dutasteride may continue after you stop taking  dutasteride. Talk to your doctor if you have concerns about these side effects.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Dutasteride side effects (more detail)
