September 2024 in “International Journal of Applied Pharmaceutics”
This study describes a new LC-MS/MS method for analyzing Finasteride and Tadalafil, demonstrating system suitability, linearity, and accuracy in pharmacokineticstudies in rats, aligning with USFDA guidelines.
This study concluded that domestic and imported finasteride tablets are bioequivalent, showing no significant differences in pharmacokinetic parameters among healthy volunteers.
August 2023 in “Journal of Chromatographic Science”
This study developed a reliable UHPLC-MS/MS method to measure flavonoids from Pinus massoniana needles in rat plasma for pharmacokinetics, aiding further research on their potential use in external preparations to prevent hair loss.
18 citations
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December 2005 in “Journal of Medicinal Chemistry”
In this study, novel substituted benzoyl benzoic acids and phenylacetic acids were potent and selective inhibitors of human steroid 5alpha-reductase type 2, with one compound showing promising bioavailability in rats for potential clinical evaluation.
Finasteride is prescribed at 1mg because it is FDA-approved and proven effective, despite evidence that 0.2mg may similarly reduce DHT. The 1mg dose is more effective for hair growth, and lower doses are less available.
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 doesn't directly reduce 5ar enzyme on scalp and has the same mechanism as oral, needing to go through the liver. Users debate the accuracy of this information and discuss various studies and experiences.
Concerns about the long-term effects of dutasteride and finasteride on fertility, with discussions on cycling these medications to mitigate risks. The conversation highlights skepticism about study methodologies and the importance of weighing treatment risks against potential fertility issues.
RU58841 is used topically to prevent hair loss by blocking DHT, with suggestions to drink grapefruit juice, take breaks, avoid microneedling, and use lower concentrations to reduce side effects. Users discuss applying it at night to minimize systemic absorption.