Mintop 2% Solution belongs to the class of ‘vasodilators’ used to treat alopecia (hair loss). Mintop 2% Solution stimulates hair growth and slows down the process of balding. Alopecia is the thinning or loss of hair on the scalp or any part of the body. Mintop 2% Solution belongs to the class of ‘vasodilators’ used to treat alopecia (hair loss). Mintop 2% Solution stimulates hair growth and slows down the process of balding. Alopecia is the thinning or loss of hair on the scalp or any part of the body.