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? — B.M., Lower East Side, N.Y.
A: In addition to minoxidil 5%, Rogaine Foam contains: butane, butylated hydroxytoluene, cetyl alcohol, citric acid, fragrance, glycerin, isobutane, lactic acid, polysorbate 60, propane, purified water, SD alcohol 40-B, stearyl alcohol — but no propylene glycol.
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