An essential vasodilator with some anti-androgenic effects
- From hypertension to hair: the unexpected story of minoxidil Minoxidil was developed as an oral blood-pressure drug and approved as Loniten in 1979; unwanted hair growth in patients led to topical Rogaine, approved for men in 1988 and for women in 1991. Trials support topical minoxidil for pattern hair loss, while low-dose oral minoxidil is a prescription drug used off-label and needs medical supervision.
- Minoxidil 2%, 5% and 10% which is better to use? In a randomized trial in men, 5% topical minoxidil produced more hair growth than 2%. There is no approved 10% product and no head-to-head trial showing it beats 5%; higher strengths mainly add irritation and systemic absorption. Approved strengths differ by sex, so check the label for your product.
- What are the side effects of minoxidil, and can oral minoxidil affect your heart? Minoxidil can cause side effects, and because it was designed as a blood-pressure drug, some of them involve the heart and circulation. Published studies of low-dose oral minoxidil describe mostly mild problems, but fluid around the heart, pericarditis and other serious events have been reported, and the long-term picture is still being studied. Do not start, stop or change minoxidil without a doctor, and if you develop chest pain, a racing heartbeat, shortness of breath, fainting, swelling or rapid weight gain while using it, stop and seek medical care.