That's right, 25mg per day, or later even a half or quarter tab. Just as long as I had some Proviron in my system, I felt alright. But when I tried to discontinue it completely, I felt very ill and had what I would term withdrawal symptoms, just like the men in the study I posted.
We studied whether long-term use of mesterolone (12 weeks and longer) changed the pattern of steroid metabolites in urine from male subjects. We noticed an increase in dehydroepiandrosterone (DHEA) levels from 211-4 +/- 130.5 ug/die to 9943.8 +/- 6564.7 ug/die in the urine of all subjects...
pubmed.ncbi.nlm.nih.gov
Whether that is because of an effect on DHEA as suggest in the study, or because taking an exogenous DHT might have an effect on your body's own ability to synthesize it's own DHT by 5-AR, I don't know.
All I know is, I felt bad, really awful and sick, when I tried to stop, developed some gyno, and felt much better once I went back on.