Question: I get hypertrichosis all over my body from taking oral minoxidil for MPB. The tiny hairs get longer and darker and I want to know if it is reversible? Do I have to stop treatment for it to stop happening? Or should I switch to topical minoxidil. I don't want to stop treatment if possible.
Answer: Hi, George. Hypertrichosis - excessive hair growth - is a possible side effect from minoxidil. It may sometimes present on the face, or, rarely, on the body.
Hypertrichosis generally presents as thickened vellus hairs, stimulated by minoxidil, which, therefore appear more visible.
You may wish to switch from oral minoxidil - which is not currently MHRA-licensed nor FDA-approved as a hair loss treatment for Male Pattern Baldness - to a topical formulation. This should be done in consultation with your current doctor, dermatologist or hair loss specialist, who can help to find the best option for your needs.
When using the topical hair loss solution, rather than taking minoxidil in tablet form, certain steps can be taken to help reduce the severity of this side effect. For example:
If you do choose to switch to topical minoxidil and none of the above recommendations help and the hypertrichosis is severe, we would advise stopping treatment. Alternatively, hair removal treatments may be used.
Once the treatment is stopped, this hair growth is not permanent. Vellus hairs don’t have big, strong follicles so once they stop being stimulated, the hair returns to its original thickness - this is naturally quite fine and short.
It is important to know that certain medical conditions can also contribute to hypertrichosis. In women, this could be PCOS, for example, but in men potential causes of hypertrichosis include hormone imbalances, conditions such as hyperthyroidism or anorexia, cancer and side effects of certain medications, besides minoxidil. These include acetazolamide, cyclosporine, phenytoin and diazoxide.
Should the hypertrichosis be solely related to minoxidil use, it should wear off once you discontinue use. Permanent side effects from minoxidil have not been reported.
If you decide to stop using minoxidil, there are alternative male hair loss treatment options you could consider. These include finasteride 1mg, an oral DHT inhibitor, and hair growth supporting products such as the FDA-cleared LaserBand, which uses medical grade lasers to stimulate accelerated hair growth.
The Belgravia Centre is a world-renowned group of a hair loss clinic in Central London, UK. If you are worried about hair loss you can arrange a free consultation with a hair loss expert or complete our Online Consultation from anywhere in the world for home-use treatment.
View our Hair Loss Success Stories, which includes the world's largest gallery of hair growth photos and demonstrates the level of success that so many of Belgravia's patients achieve.