I see, didnt know that.
Actually the information comes from the PFS foundation…
Here’s a link.
Q: I understand we don’t know which is riskier, quitting finasteride or staying on it, but I still want to quit. Should I stop taking the drug cold turkey, or gradually taper off it?
There is evidence indicating that the longer someone takes finasteride, the higher the risk of developing PFS. Additionally, although the drug is eliminated from the blood relatively quickly (half-life 4.8 to 6 hours), it remains active for much longer because it irreversibly binds to (and blocks the normal functioning of) the target enzyme 5-alpha-reductase (half-life 30 days). After finasteride is discontinued, the body must produce new 5-alpha-reductase molecules to replace the ones that were inactivated by the finasteride. In other words, the biological effects of finasteride ensure a relatively slow tapering of the “drug effect” over about 30 to 60 days, even if you stop the drug cold turkey. All these factors would indicate that tapering off finasteride offers no advantage compared to abruptly stopping the drug. On the other hand, there are reports of people developing PFS within a few days of stopping finasteride. This would suggest that tapering might be a safer approach. The bottom line is that no one knows if tapering off is safer than abruptly discontinuing the drug. But we do know for sure that once someone develops PFS, their symptoms typically increase in severity in proportion to the length of time they took finasteride.