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Tribolin (nandrolone/methandriol blend)

Chemical Composition
Nandrolone phenylpropionate + Methylandrostenediol Dipropionate (methandriol) blend (Trade name: Libriol, Tribolin, and Anabolic NA)
Nandrolone base + phenylpropionate ester (or Decanoate or Cypionate ester, respectively)
Formula (base): C18 H26 O2
Formula (ester): C9 H10 O2
Molecular Weight(base): 274.4022
Melting Point (base): 122-124C
Manufacturer: RWR
Effective Dose (Men): 200-400mg/week (2mg/lb of Bodyweight)
Effective Dose (Women): 50-100mg/week
Active life: 15 days
Detection Time: Up to 18 months
Anabolic/Androgenic Ratio: 125/37


Tribolin, a.k.a. Tribolin 75, is a veterinary steroid blend of 40 mg/ml of methandriol dipropionate and 35 mg/ml of nandrolone decanoate. Ranvet Company, Tibolins primary manufacturer, also produces a very similar 70 mg/ml blend (minus 5 mg of nandrolone) called Filybol Forte.

Methylandrostenediol, a.k.a. methandriol, is a dihydrotestosterone (DHT) derived anabolic steroid with a rather weak anabolic and androgenic classification. In fact, Methylandrostenediol is so mild that it isn't used as an independent bodybuilding drug. Nevertheless, when added to a steroid cocktail with potent compounds, or combined with another steroid (as with Tribolin) it makes a great anabolic.

Steroid Form

Tribolin is an oil steroid preparation for intramuscular injection. Its composition is 40 mg/ml of methandriol dipropionate and 35 mg/ml of nandrolone decanoate. Tribolins total steroid concentration equals 75 mg/ml, which typically comes in 10 and 20 mg/ml multi-dose vials. The Filybol Forte blend (70 mg/ml) comes in the same form and vial sizes.


Indications/Purpose & Side Effects

For the Indications/Purpose & Side Effects of Tribolin see the Deca-Durabolin profile.


Additional Information


Tribolin, when taken in anabolic promoting dosages, represents an effective stand-alone steroid blend, but it is often far more practically administered as a stacked ingredient within both bulking and cutting anabolic cycles. Tribolins 40 mg/ml of methandriol dipropionate produces noticeable muscle hardening, water reducing, and vascularity improving effects.

When used within mass building cycles its usually stacked with testosterone and/or powerful orals like Oxymetholone (Anadrol) or Methandrostenolone (Dianabol). In cutting cycles its combined with short-ester injectable anabolic steroids such as testosterone propionate and Boldenone Acetate, and/or with DHT-derived orals like Stanozolol (Winstrol) and Oxandrolone (Anavar).

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