REDUCING THE RISK OF SIDE EFFECTS WITH MINOXIDIL
Some reactions to minoxidil are unavoidable, it is advisable to carry out a 24 hour patch test. If you experience no adverse reactions are 48 hours you can assume it is safe to use minoxidil but be aware an intolerance to minoxidil or the solvents within the solution can develop over time. Avoid using products that contain alcohol in the same area you apply minoxidil unless this is approved by a healthcare provider.
Whilst you can safely use relaxers, hair dyes and perms, it is recommended to not apply these to the scalp on the same day as using minoxidil. If you do need to use any chemical treatment on your hair, skip minoxidil for the day of the treatment and for 24 hours after application of any chemicals to the scalp. For the vast majority, minoxidil is able to restore hair growth safely, but there are potential risks. Most individuals experience very minor adverse risks, such as itching or mild stinging, due to the vasodilative effect of the therapy.