There are more than three kinds of drugs for hair loss treatment. Commonly used drugs include finasteride, minoxidil, spironolactone, glucocorticoids, etc., which need to be treated for different causes. 1. Finasteride: Finasteride is a commonly used drug for androgenetic alopecia. Oral finasteride tablets can slow down the rate of hair loss, but this drug is generally ineffective in women. Adverse reactions are mainly sexual function is affected, skin rash, prohibited for those who are allergic to finasteride. 2. Minoxidil: Minoxidil is used for the treatment of male pattern baldness and pemphigus, the common adverse reaction is mild dermatitis of the scalp, and is prohibited for those who are allergic to Minoxidil. 3. Spironolactone: Spironolactone is only suitable for some women with androgenetic alopecia, the main adverse effects are menstrual disorders, decreased libido, etc. It is forbidden for patients with hyperkalemia. 4. Glucocorticosteroids: Prednisone and other glucocorticosteroids are commonly used in the treatment of baldness, and long-term use of these drugs should be vigilant about the side effects of weight gain, metabolic abnormalities, acne, and so on. The use of drugs should be under the guidance of medical professionals.