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  • Title: The penetration enhancer SEPA augments stimulation of scalp hair growth by topical minoxidil in the balding stumptail macaque.
    Author: Diani AR, Shull KL, Zaya MJ, Brunden MN.
    Journal: Skin Pharmacol; 1995; 8(5):221-8. PubMed ID: 8527153.
    Abstract:
    The purpose of this study was to determine if the penetration enhancer SEPA (2-n-nonyl-1,3-dioxolane) would augment the scalp hair growth effects of topical minoxidil in the balding stumptail macaque. A 1-in2 area on the balding scalp of 40 adult female monkeys (four drug-treated and four vehicle-treated groups of 5 monkeys each) was topically treated 5 days/week, q.d. or b.i.d., with approximately 250 microliters of minoxidil-SEPA (2.5% minoxidil, weight/volume in 10% SEPA, 25% propylene glycol and 65% isopropyl alcohol), Rogaine topical solution (TS, 2% minoxidil, weight/volume in 20% propylene glycol, 60% ethanol and 20% water) or respective vehicles (without drug) for 16 weeks via paintbrush application. Scalp hair was collected by shaving and vacuuming the dosed area at baseline and at 4-week intervals. The shaved hair was filtered, weighed and recorded as the change from baseline. The q.d. and b.i.d. minoxidil-SEPA groups displayed a significant increase in hair weight compared to their respective vehicles at week 4 whereas q.d. and b.i.d. Rogaine TS groups were not active until week 8 and 12, respectively. Both minoxidil-SEPA treatments produced significantly greater cumulative hair weight over the entire 16-week study compared to either of the Rogaine TS treatments. Comparable increases in cumulative hair weight were evident between q.d. and b.i.d. minoxidil-SEPA groups and between q.d. and b.i.d. Rogaine TS groups.(ABSTRACT TRUNCATED AT 250 WORDS)
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