A Stability-Indicating HPLC Method to Determine Finasteride in a Tablet Formulation

OP is considering using Stemoxydine or the Ordinary Multi Peptide Hair Serum as a carrier for topical finasteride, avoiding minoxidil due to palpitations. They plan to crush finasteride pills into a 30 ml solution.

Store finasteride powder in a cool, dry place. RU58841 needs to be stored in the freezer.

Finasteride pills don't fully dissolve in a DIY topical solution due to fillers, resulting in residue. Users suggest shaking well before application and note that commercial solutions appear clearer.

OP is trying to dissolve finasteride powder for a topical solution but faces issues with it not dissolving properly in ethanol or water. Users suggest methods like using a magnetic stirrer, shaking the mixture, or filtering out fillers, with some noting that finasteride is soluble in alcohol.

A user is discussing making a DIY topical finasteride solution using ingredients like water, alcohol, propylene glycol, ethanol, and glycerin, and is concerned about the stability of the mixture. Other users suggest that the solution will work and discuss the importance of propylene glycol for drug dissolution and factors like temperature and light affecting finasteride stability.

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.