im not a doctor… so please take that into consideration. however… i copied this from the website FAQ.
- I’m currently taking the drug, experiencing side effects and want to quit. How should I quit?
Firstly, unlike other medications whereby reducing dosage would reduce the medications effect, Finasteride does not operate in this manner due to its extreme potency against the 5AR2 enzyme and resultant DHT surpression, whereby it can take up to a week or more for DHT to even begin to return to baseline after a single dose, as noted here: propeciahelp.com/forum/viewt … 2187#12187
In addition, Finasteride has a near-flat dose response such that 0.05mg inhibits nearly as much DHT as 1mg, as evidenced here: physics.upenn.edu/facultyinf … index.html ).
Thus, the question is: should I quit cold turkey or ween off the drug? Obviously the sooner one can get off the drug, the better. We have no evidence that either method will make a difference in terms of “avoiding” side effects after quitting, but going by common sense, we believe it makes sense to ween off in order to help reduce shock to the endocrine system. Additionally, according to Dr. Crisler, DO ( allthingsmale.com ), weening off over several weeks is advisable.
If you are taking Propecia, we recommend gradually reducing the dosage from 1mg to 0.5mg (half a pill) to 0.25mg (quartered pill) to 0.125mg (8th of a pill), to 0.0625 (16th of a pill) over time while increasing the days between dosing (ie instead of taking it everyday, take it every every 3rd day, 5th, 7th and so on), until you are ultimately no longer taking the drug.
If you are taking Proscar, same concept – reduce from 1.25mg/day (quartered), down to 0.625mg (8th) and possibly 0.313mg (16th of a pill – if even possible to split it this much), over time.
Before you quit, it is also recommended you take bloodtests as outlined in section 6. This is so that you will have evidence of Finasteride’s effects on your hormones while on the drug, to compare against after quitting.