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Agovirin Depot (Testosterone Isobutyrate)

Chemical Composition

Testosterone base + Enanthate Ester
Molecular Weight: 358.51
Formula (base): C23H34O3
Melting Point (base): 155
Manufacturer: Various
Effective Dose (Men): 300-2000 mg+/week
Effective Dose (Women): Not recommended
Half-Life: 15 Days
Detection Time: 3 Months
Anabolic/Androgenic Ratio: 100/100



Agovirin Depot, a.k.a. testosterone isobutyrate, is testosterone in a water-based suspension (with no ester added to it) so its relatively fast-acting.

Although Agovirin Depot is similar to testosterone suspension in that it lacks an ester, the pharmacokinetics of these two drugs are very different. Suspension has nothing to slow its release into the bloodstream, and must therefore be shot daily or twice daily for optimal results. Agovirin Depot contains a microcrystalline additive which basically mimics ester effects. The crystals have very low water solubility, which effectively delays the release of free testosterone into the bloodstream. Consequently, Agovirin Depots release is slower than testosterone suspension and propionate, yet slightly faster than testosterone cypionate and enanthate.

Steroid Form

Agovirin Depot is most often boxed (5 ampules per box) and packaged in 2 ml ampules, each containing 25 mg/ml of testosterone mixed in a water-based crystalline solution. Since Agovirin Depot is water-based, the steroid (oil) and water will naturally separate when left sitting and requires shaking in order to re-suspend the drug within the water for accurate dosing.

Indications/Purpose & Side Effects

For the Indications/Purpose & Side Effects on Agovirin Depot see the Testosterone Propionate profile.

Additional Information

Agovirin Depot has a rather unique design which differs from traditional testosterone with oil-based esters. In short, once the microcrystalline suspension is intramuscularly injected, the crystals form a repository/deposit (a lot like regular testosterone) within the muscle where they slowly dissolve/release into the bloodstream. However, due to the crystals, this solution is a lot denser or bulkier so to speak, requiring extra slow injection. The manufacturer actually recommended using a larger (up to 21 gauge) needle which would be extremely painful causing redness, and general irritation. Obviously using a slower more steady injection rate with a traditional injection size needle (23 or 25 gauge) would be preferable.

Agovirin Depot serves as a solid testosterone base for bulking cycles that include Deca-Durabolin, Dianabol, Equipoise, and Trenbolone. It also makes strong cutting cycle base for compounds like Anavar, Winstrol, Primobolan, and Oral Turinabol.

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