Q:What is the difference between Rogaine for men and Rogaine for women?

A: Rogaine for men is 5% minoxidil and Rogaine for women is 2%. Another difference is that the 5% solution has propylene glycol in it whereas the 2% is alcohol based. The propylene glycol helps the minoxidil penetrate the skin better and makes the medication more effective. Although both the alcohol and propylene glycol based preparations can irritate the scalp, propylene glycol can cause actual allergic reactions in those who are sensitive.

Propylene glycol is greasier to have on the scalp than the alcohol based formulation. For patients who complain of the greasiness, we advise Minoxidil 5% at bedtime and 2% in the AM.

A side effect of minoxidil specific to women is increased facial hair and this is seen predominately with the 5% propylene based formulation. Women are also more likely to experience lightheadedness or dizziness from the medication.