Active substance: Finasteride
Active life: ~5–6 hours
Detection time: Approximately 5 to 7 days, depending on dosage and individual metabolism.

Finasteride is a 5-alpha reductase inhibitor primarily used to treat benign prostatic hyperplasia (BPH) and male pattern baldness. By inhibiting the enzyme 5-alpha reductase, it reduces the conversion of testosterone to dihydrotestosterone (DHT), a hormone responsible for hair loss and prostate enlargement.

It is effective in preventing hair loss by lowering DHT levels, helping to preserve hair follicles in men with androgenic alopecia. It also plays a role in reducing the size of the prostate in cases of BPH, improving urinary symptoms.

How to use:

Finasteride is typically taken once daily, with or without food, for the management of hair loss or prostate enlargement.

Common dosage:
1 mg per day for hair loss prevention. For BPH, the usual dose is 5 mg per day.

Important considerations:

• Side effects may include reduced libido, erectile dysfunction, and changes in ejaculation, though these are often reversible upon discontinuation.

• Long-term use requires monitoring for potential prostate-related issues.

• Not recommended for use in women or children, and caution is advised for individuals with liver or kidney issues.

Finasteride is primarily used to manage DHT-related conditions, with the main applications being the treatment of hair loss and BPH.