Finasteride is a medication used to treat symptoms of benign prostatic hyperplasia (BPH) and male pattern hair loss, also called androgenetic alopecia. It works by blocking the action of an enzyme called 5-alpha-reductase, which changes testosterone to another hormone that causes the prostate to grow. By reducing the amount of this hormone, finasteride decreases prostate size and makes BPH symptoms less severe. It also leads to increased hair growth and decreased hair loss of the hair on the head.
Here are some details about the positive and negative effects of finasteride:
Positive effects:
- Decreases the severity of BPH symptoms and reduces the chance that prostate surgery will be needed.
- Increases hair growth and decreases hair loss of the hair on the head.
Negative effects:
- Decreased sexual ability/desire may occur.
- In some men, this medication can decrease the amount of semen released during sex.
- May decrease fertility in men.
- Can cause ejaculation problems and inability to have or maintain an erection.
- May increase breast size and tenderness.
- May cause skin rash.
- May cause depression.
- May cause pain in the testicles.
- May cause changes in the breasts such as increased size, lumps, pain, or nipple discharge.
- May cause itching and hives.
- May cause swelling of the lips and face, difficulty breathing or swallowing.
It is important to note that not all people who take finasteride will experience these side effects, and some may experience side effects not listed here. If you experience any of these symptoms, it is important to talk to your doctor or pharmacist promptly.
