Approaches for Estimating the Clinical Starting Dose of New Dosage Forms: An Example of a Long-Acting Injectable Formulation of Finasteride

A peptide-based delivery system for finasteride shows promise in reducing systemic side effects while maintaining hair growth effectiveness. Combining this with other treatments like minoxidil and RU58841 could enhance results with lower systemic absorption.

The conversation discusses using very low dose topical finasteride to achieve specific serum DHT reduction percentages. It concludes that finasteride dosage increases linearly between 5-30% DHT reduction but requires exponential increases for reductions up to 70%.

Minoxidil, finasteride, and RU58841 are discussed as treatments for hair loss, with excitement around a new drug, PP405, and a reformulated oral minoxidil in trials. Concerns about cost, side effects, and long-term use are also mentioned.

Delayed release oral minoxidil is seen as a promising advancement for hair loss treatment, offering safer, higher doses and more consistent hair follicle stimulation compared to current options. However, it is not expected to replace finasteride or dutasteride, as it does not prevent androgenetic alopecia.

PP405 may promote short-term hair growth by pushing follicles into the growth phase, but concerns exist about long-term effects due to lack of rest phases. Users discuss various treatments like finasteride, minoxidil, spironolactone, alfatradiol, and investigational drugs like KX-826 and GT20029 for hair maintenance and regrowth.

PP405 might make minoxidil unnecessary, but finasteride or other 5AR inhibitors may still be needed. PP405 is expected to be expensive and not available until at least 2028, with limited information on its effectiveness.