UPDATED: As of fall 2000, the formula for Omnadren 250 is identical to the formula for Sustanon 250.

by Bill Roberts - This preparation is quite similar to Sustanon, and is different only in that 100 mg/mL of it (of 250 mg/mL total) is testosterone hexanoate instead of the testosterone decanoate used in Sustanon. For this reason, Omnadren has a shorter half life, and will give a faster initial increase in blood level. This accounts for the claim of increased water retention and increased side effects, since levels, at first, are higher for the same dosage.

The claim that Omnadren has a duration effect of "a good 2-3 weeks" is somewhat misleading since the half life of the longest lived component is only about 5 days. There is of course some effect 2 or 3 weeks after injection, but relatively little.

The hexanoate ester is quite similar to the well known enanthate ester, but is shorter by one carbon.

The isohexanoate ester in Omnadren is the same, only named differently, as the isocaproate ester in Sustanon. Thus, the hexanoate vs. decanoate difference is the only difference in the mixture of esters.

Trivial name	Testosterone [USAN:INN] (base)
Chemical name	17ß-hydroxyandrost-4-en-3-one
Systematic Name	(8S,9S,10R,13S,14S,17S)-17-hydroxy-10,13-dimethyl-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one
Index name	Androst-4-en-17beta-ol-3-one
CAS number	58-22-0
Empirical formula	C19-H28-O2
Merck Index Number	Merck 11, 9109
Molecular weight	288.424 g/mol
Pregnancy category	X
Legal status	Prescription only (US); DEA Schedule III (US)
Routes of administration	Transdermal

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Publication Date: November 1, 1998