Minoxidil is a peripheral vasodilator that, when used topically on the scalp for prolonged periods of time, can stimulate hair growth in patients with male pattern baldness and pemphigus vulgaris, and can have side effects such as mild dermatitis of the scalp, allergic rhinitis, non-specific allergic reactions, facial swelling, windburn, vertigo, and edema. The drug should not be taken orally, and when in contact with sensitive surfaces such as the eyes, abraded areas, and mucous membranes, it may produce irritating effects such as a burning sensation, and the area should be rinsed with plenty of cold water. Use with caution in pregnant and lactating women, children under 18 years of age, and elderly patients over 65 years of age; use with caution in allergic individuals. It is contraindicated for those who are allergic to the drug. If you need to use the drug patients, please be sure to be under the guidance of a doctor or pharmacist, strictly comply with the doctor’s instructions to take medication, do not self-medication.