Is it true that you have to keep using rogaine once start because can cause rapid hair loss if stop?

It is true that you may experience rapid hair loss if you stop using rogaine. This is because rogaine (minoxidil) works by increasing the blood supply to the hair follicles, which stimulates hair growth. When you stop using rogaine, the blood supply to the hair follicles decreases and the hair growth cycle is disrupted. This can cause the hair to become thinner and weaker, and eventually lead to hair loss.

In general, it is recommended that you continue using rogaine for as long as you want to maintain hair growth. However, it is important to talk to your doctor about the potential risks and benefits of using rogaine before starting treatment.