Is Rogaine Foam Making My Hair Thinner?

Hello doctor. First of all, I appreciate that you provide us with such valuable information, it truly helps. Anyway, I began using Rogaine foam about 4 months ago, but I only have been using it once a day. Since then my hair has become increasingly thinner. I am going to quit using it and continue taking Propecia. Could it be the Rogaine that is making my hair thinner, or do you believe it is just coincidental timing?

If you are not having an allergic reaction to Rogaine Foam (minoxidil), I doubt it will cause hair loss. Once a day use is inadequate for maximum benefit, as it requires twice daily use. Rogaine Foam and hair loss may not be related at all.