Minoxidil is effective in treating hair loss. 1. Minoxidil is a kind of peripheral vasodilator drug, when used locally for a long period of time, it can stimulate the growth of hair, and it is mainly used for the treatment of male pattern baldness, patchy baldness and other diseases, and it has no effect on the scalp scarring or injuries and the occurrence of hair loss. 2. Adverse reactions such as localized skin redness, swelling, burning pain, dermatitis, itching, facial hirsutism may occur during the use of Minoxidil. In severe cases, hypersensitivity reactions may occur, with severe symptoms such as tightness of the throat, facial edema and generalized erythema. Contraindicated for those who are allergic to the drug ingredients. Note that it is limited to topical use on the scalp and should not be taken orally or applied Minoxidil to other areas of the body. It is recommended that patients should consult a professional doctor before using Minoxidil, and should not use the drug blindly to avoid adverse reactions.