Pampa Baby Hair Minoxidil 20% is a treatment for hair loss and hair loss-related conditions, such as alopecia. People may not notice any difference in their hair until they use minoxidil for at least 8 weeks. How to use minoxidil Minoxidil comes in the form of a Serum solution, and people usually apply it twice a day. A person should ensure that their scalp and hair are dry and that their scalp is not sunburnt. It is important to read all instructions carefully. People usually apply minoxidil using a pipette or a spray. They should avoid putting this on any part of the body you don’t want it grow hair. If the minoxidil comes into contact with the eyes or skin, a person should wash the area with cool water. If the area becomes irritated, they should call a doctor.