This leaflet will give you information about what Minoxidil is, how it works, how it is used to treat hair conditions, and where you can find out more about it. A member of staff will speak to you about everything in this leaflet, but if you have any questions, please ask us. What is Minoxidil and how does it work? Minoxidil is a drug usually prescribed for patients to manage high blood pressure. We don’t know exactly how it helps with the hair growth, but some studies have shown that in smaller doses, it increases the blood flow and supply of nutrients to the hair roots which prolongs the growth phase of hair. It has also got protective effects from certain hormones which are responsible for certain types of hair loss.