Does finasteride shrink the thickness of the hair?

I never considered that fin could make the individual hair follicles thinner. (Can it?) I’ve noticed after the one month mark that the density of my hair has gone drastically down.

Finasteride doesn’t cause hair follicles to become thinner. Finasteride will help reverse miniaturized hair to become thicker. If you believe to the contrary, purchase a micrometer from Amazon (only $22) and measure your hair thickness. This is the one I use: https://www.amazon.com/dp/B09964YBMF?ref=ppx_yo2ov_dt_b_product_details&th=1