Q: Do you think there is a difference in the efficacy between the 5% Rogaine foam or liquid formula? A: In theory, the foam should be as effective as the original solution (liquid). However, an important part of the efficacy is getting the medication directly onto the scalp – rather than just on the hair. [...]

Q: Our dermatologist originally suggested our son use the 5% Rogaine and he developed an allergic reaction to it. Allergy tests confirmed it was the propylene glycol causing the reaction. I understand that Rogaine foam has 5% minoxidil in it but no propylene glycol. Is that correct? A: In addition to minoxidil 5%, Rogaine Foam [...]

Q: I stopped using Rogaine for my hair transplant, when can I start using it again? And would it be any different with the new Rogaine foam. A: I would wait at least 7 days to use Rogaine (minoxidil) in either liquid or foam. The foam has less alcohol and can be irritating when applied [...]