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by Bill Roberts - Proviron, an anabolic steroid,
is particularly interesting. I suspect that it not
only acts as an antiaromatase but in an unknown
DHT-like anti-estrogenic manner. This might involve
estrogen receptor downregulation for example. In
any case,
aromatase inhibition and/or
Clomid don’t seem to give
the same effect on appearance and muscle hardness
as when Proviron is included.
This drug has good binding to the
androgen receptor, but in muscle tissue most of
it never reaches the androgen receptor because it
is enzymatically converted to the diol. Thus, it
is not an effective anabolic. It is somewhat effective
as an anti-gyno agent, however, and appears to reduce
estrogenic bloating if that problem exists.
Proviron reduces either levels of estrogen or
the effect of estrogen. Thus, it is useful for avoiding
gynecomastia, although it probably should not be
relied upon as the sole drug for that. It is not
hepatotoxic. It has the usual side effects of anabolic/androgenic
steroids, with the added effect that it is particularly
prone to cause erections.
Mesterolone is the chemical
name of active ingredient in Proviron. Proviron
was a registered trademark of Schering AG in the
United States and/or other countries prior to cancellation.
Proviron Resources
Proviron Pictures
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|
|
Substance name
|
Mesterolone [USAN] |
| Chemical name |
Androstan-3-one,
17-hydroxy-1-methyl-,
(1alpha,5alpha,17beta)- |
| Systematic name |
IUPAC:
(1S,5S,8R,9S,10R,13S,14S,17S)-17-hydroxy-1,10,13-trimethyl-1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-3-one |
| CAS number |
1424-00-6 |
| Merck Index Number |
Merck 11, 5817 |
| Chemical formula |
C20-H32-O2 |
| Molecular weight |
304.467 g/mol |
| Bioavailability |
|
| Metabolism |
Hepatic |
| Elimination half-life |
? |
| Excretion |
Urinary: 90%; Fecal: 6% |
| Pregnancy category |
X |
| Legal status |
Illegal (US); DEA Schedule III (US) |
| Routes of administration |
Oral |
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Beyond Steroids by Anthony Roberts - The Newest and Most Effective Bodybuilding
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The Layman's Guide
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Publication Date:
June 1998
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