Minoxidil was the first drug approved by the American Food and Drug Administration for the treatment of androgenetic alopecia (hair loss). Before that, minoxidil had been used as vasodilator drug prescribed as oral tablet to treat high blood pressure, with side effects that included hair growth and reversal of male baldness.
For the treatment of hair loss, minoxidil is available as a topical solution that is generally either 2% or 5% minoxidil in propylene glycol. The propylene glycol ensures that the applied minoxidil is evenly spread across the affected area and easily absorbed through the skin.
How does Minoxidil work?
Minoxidil topical solution is used to stimulate hair growth in people who are balding. The drug seems to exert its maximum effect at the crown of the head. The exact way that minoxidil works is not known, but it may stimulate hair growth by improving the blood supply to the hair follicles.
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