There are a few different types of 5 alpha reductase inhibitors (5ARIs) available on the market, each with their own benefits and drawbacks. #Finasteride (#Proscar) and dutasteride (#Avodart) are the most commonly prescribed medications in this class. They work by blocking the conversion of testosterone to dihydrotestosterone (DHT), which is responsible for many of the masculinizing effects of testosterone. This can be helpful for transgender women who want to reduce their levels of DHT and achieve a more feminine appearance. However, there are some potential side effects associated with these medications. Finasteride can cause breast enlargement and tenderness, while dutasteride may increase the risk of developing prostate cancer. Additionally, both #drugs can cause decreased libido and erectile dysfunction in men. For this reason, they should only be taken if absolutely necessary and under close medical supervision. #health