@just_me @12345
You are "quoting" a statement from a research on rats.
The authors report the conclusion of other studies.
So, read the references to have a clear picture.
In fact, the way the quotes are quite deceptive.
The authors claim that duta stays up to 6 months quoting a study(n. 16) where the subject received from 0.01 to 40 mg of dutasteride (0.01, 0.1, 1, 2.5, 5, 10, 20 and 40mg).
Considering that "at daily doses above 1 mg day−1the steady state concentrations are almost entirely dependent on the linear clearance mechanism", you can guess that using 40mg daily (that is 8x what you use for hair loss or prostate), you can find some traces after 196 days (by the record, if you see the datas, all the subject were at baseline after 50/60, except one that showed traced after 180 days).
by the other way, he quotes another study (18) that states:
"Lastly, slight decreases in sexual function were noted during treatment and these changes were largely reversed during recovery. The clinical relevance of these small reductions in measurements of sexual function is unclear. It is notable that the overall satisfaction score did not change during treatment, implying that the slight changes in sex drive, erectile and ejaculatory function experienced by subjects did not adversely affect global sexual function or sexual satisfaction".