>>18480285
>New research finds finasteride (Propecia) causes penis shrinkage in rats
>A new study in the Journal of Sexual Medicine finds that male rats receiving oral finasteride treatment for four weeks had a 25% reduction in the weight of their penis (corpora cavernosa).
Effects of oral finasteride on erectile function in a rat model:
https://pubmed.ncbi.nlm.nih.gov/22375859/