Will Rogaine Still Be Effective if Used Once a Day Instead of Twice a Day?

July 20th, 2006

Q: If Rogaine is used only once a day will it still be effective?

A: Once a day topical use of Rogaine (topical minoxidil 2% and 5%) is probably almost as effective as using it twice a day. The reason is, although minoxidil has a relatively short half-life of several hours when given orally, when topically applied, it has a half-life of 22 hours in the skin.

This suggests that once-a-day dosing is a reasonable option. It is important to realize that Pfizer, the company that now makes Rogaine, specifically states that it will be less effective if used only once a day.

Read about Rogaine (minoxidil)
Read Tips on Using Rogaine

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Posted by Robert M. Bernstein M.D. on July 20th, 2006 at 9:11 am


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