Rogaine solution inactive ingredients propylene glycol official?

Yes. Propylene glycol is listed as an inactive ingredient in Rogaine (minoxidil) topical solution. The official labeling for the 2% and 5% minoxidil solutions lists inactive ingredients as ethyl alcohol (ethanol), propylene glycol, and water.

If you’d like, I can pull the current labeling text or provide the DailyMed/FDA link for exact wording. Also note the foam formulation has different inactive ingredients.