Pig skin is a good substitute for human skin to measure drug absorption, but differences in skin structure and enzymes across species must be considered.
User wants to make homemade topical finasteride to minimize side effects and asks about using glycerin, stirring time, storage, and alternative solvents. Another user's comment is unclear.
A medical student experienced hair loss slowing with Finasteride but developed severe, treatment-resistant insomnia. They tried various medications with little effect, suspecting Post-Finasteride Syndrome, and others suggested the insomnia might be linked to Finasteride's impact on neurosteroids.