in general both dutasteride (avodart) and finasteride (formerly trade name of proscar) cause the psa to decrease by about 1/2 after continuous use for about 6 months. results in individual men will vary due to a multitude of factors such as the size of the prostate underlying prostatitis (prostate inflamation) sexual activity (or lack thereof) before the psa test vigorous exercise such as riding a bike before the test and likely other individual factors such as obesity statin use hormonal (testosterone) levels and other factors we have yet to discover.
if i discontinue taking avodart for my enlarged prostate will my psa readings go back to normal?