MX 2% TOPICAL contains minoxidil which belongs to a group of medicine called vasodilators. MX 2 Topical Solution is a potassium channel opener. Its vasodilation action expands the blood vessels. Therefore, when it is applied to the scalp, it helps to increase blood flow. This increased blood flow provides more nutrition and oxygen to the hair follicles, which prevents hair cell death and also enhances new hair growth. This is how it works to treat your alopecia (hair loss).