Propecia (finasteride) side effects

What side effects can finasteride have?

Below you will find the most important information on possible, known side effects of finasteride.
These side effects do not occur, but you can. Because every person reacts differently to medication. Please also note that the type and frequency of side effects may vary depending on the drug formulation (eg tablet, syringe, ointment).

Depending on the field of application, the active substance is used in varying amounts, which determines the frequency and type of side effects.

Side effects in the treatment of benign prostate hypertension
Common Side Effects:
Impotence, temporarily decreased libido, decreased amount of seminal fluid.

Occasional side effects:
Rash, ejaculation disorders, breast tenderness, breast enlargement

isolated side effects:
abnormal secretions from the chest, breast knots.

Side effects of unknown frequency:
palpitations, itching, hives, hypersensitivity reactions (facial swelling, lip swelling), increased liver function, testicular pain, erectile dysfunction, deterioration in sperm quality, infertility, depression, sustained decreased libido.

Side effects in the treatment of hair loss
Uncommon side effects:
decreased libido, depressed mood, erectile dysfunction, ejaculation dysfunction (including decreased seminal fluid).

Undesirable effects:
Hypersensitivity reactions (including rash, itching, hives and swelling of lips and face), palpitations, increased liver function, breast tenderness and enlargement, testicular pain, infertility.

Special features:
There may be an increased incidence of breast cancer in men due to treatment with finasteride. Patients should therefore discuss any breast changes they detect immediately with their attending physician.

What interactions does finasteride show?

Please note that the interactions may vary depending on the drug formulation of a drug (eg tablet, syringe, ointment).

There are no known interactions of finasteride with other drugs.

Potential Propecia side effects may include: