The most common side effects of Dutasteride capsules, taken alone or in combination with tamsulosin, are not being able to achieve or maintain an erection *(impotence), decrease in libido* (decreased desire to have sex or a reduced sex drive), changes or problems with ejaculations* (including a decrease in amount of semen released during sex) and breast swelling or tenderness.
If breasts swelling or tenderness becomes troublesome, or if the patient notices breast lumps or nipple discharge, the patient should talk to the doctor about these changes. Additionally, some people may experience dizziness when taking Dutasteride capsules with tamsulosin.
Rare side effects (may affect up to 1 in 1,000 people) of hair loss (usually from the body) or abnormal hair growth have been reported.
Very rare side effects (1 in 10,000 people) of allergic reactions depressed mood, and pain and swelling in the testicles have been reported.
Breast cancer has been reported in patients taking Dutasteride capsules however, the relationship between long-term use of Dutasteride capsules and breast cancer is not known.
*In a small number of people some of these events may continue after taking Dutasteride capsules is stopped.
Serious side effects, how often they happen and what to do about them: See table.
Click on icon to see table/diagram/image
If these side effects and any other side effects not mentioned in this monograph are noticed, tell the doctor or pharmacist.
This is not a complete list of side effects. For any unexpected effects while taking Dutasteride capsules, contact the doctor or pharmacist.