Cutaneous Permeation And Penetration Of Sunscreens: Formulation Strategies And In Vitro Methods

Topical finasteride may have higher systemic absorption and lower efficacy when using a Propylene Glycol/Ethanol formulation compared to the hydroxypropyl chitosan (HPCH) formulation. The safety profile of topical finasteride relies heavily on the HPCH formulation, and using standard solutions might lead to different pharmacokinetics.

Topical finasteride in a liposomal formulation reduces systemic absorption compared to ethanol solutions. The user is seeking sources for such products, noting that popular options like morr-f are not liposomal.

The user is using 0.1% dutasteride, 1% minoxidil with 2% procapil and 0.005% caffeine in the morning, and 1% minoxidil with 2% procapil and 0.01% tretinoin at night. They are concerned about the solution vehicle's effectiveness in preventing systemic absorption and ensuring the products stay around the hair follicles.

The conversation discusses how the absorption rate of topical finasteride varies and is not equivalent to its oral form, with only a small percentage reaching the scalp. It also mentions that minoxidil in high concentrations is used topically because only a small amount is absorbed.

The conversation discusses the best vehicle for topical dutasteride, comparing Trichosol, Transcutol, and a gel version. It also mentions using Transcutol with ethanol to enhance transdermal delivery of Bimatoprost.

The conversation is about whether to use gloves when applying 5% RU58841 to avoid systemic absorption and if washing hands with water is sufficient. Users question the concern, noting it is applied to the scalp.