Finasteride, a common medication for hair loss, works by inhibiting the enzyme 5-alpha-reductase, which converts testosterone to dihydrotestosterone (DHT). High DHT levels contribute to hair follicle miniaturization and eventual hair loss. While effective for many, it’s crucial to understand potential side effects.
Common Side Effects
The most frequently reported side effects are mild and often temporary. These include decreased libido, erectile dysfunction, and ejaculation disorders. These usually resolve upon cessation of the drug. The incidence varies, with some studies reporting rates under 2%, while others show higher percentages, depending on factors like dosage and individual sensitivity.
Less Common but Serious Side Effects
While rare, more serious side effects warrant immediate medical attention. These include gynecomastia (breast enlargement) and depression. Inform your doctor immediately if you experience any of these symptoms.
Side Effect Summary Table
| Decreased Libido | Common | Consult your doctor; may resolve on its own. |
| Erectile Dysfunction | Common | Consult your doctor; may resolve on its own. |
| Ejaculation Disorders | Common | Consult your doctor; may resolve on its own. |
| Gynecomastia | Rare | Seek immediate medical attention. |
| Depression | Rare | Seek immediate medical attention. |
Post-Finasteride Syndrome (PFS)
A controversial topic, PFS describes persistent sexual, neurological, and other symptoms experienced after discontinuing finasteride. The existence and causality remain debated within the medical community. If you suspect PFS, thorough discussion with your doctor is necessary to explore all possible causes and management options. Further research is needed to fully understand this phenomenon.
