Methyldrostanolone Cycle Length, Dosage, and Side Effects Explained
Updated May 17, 2026 · Reviewed by the DeusPowershop editorial team
Methyldrostanolone, widely recognized by its original brand name Superdrol (and chemically known as methasterone or 17α-methyl-drostanolone), is one of the most potent and fast-acting oral anabolic-androgenic steroids (AAS) ever developed. Originally researched in the 1950s by Syntex, it was never released as a prescription medication. Instead, it emerged in 2005 as an over-the-counter dietary supplement. Despite its legal marketing at the time, methyldrostanolone is an incredibly powerful hormonal agent that shares close structural ties to drostanolone (Masteron) but features a crucial modification that drastically alters its potency, delivery, and toxicity.
For background on its chemical development and structure, see Methasterone on Wikipedia and read the clinical studies on oral steroid hepatotoxicity (PMC4214858).
The Structural Chemistry of Methyldrostanolone
Methyldrostanolone is a modified derivative of dihydrotestosterone (DHT). Chemically, it differs from Masteron (drostanolone) in two distinct ways:
- 17α-alkylation: The addition of a methyl group at the carbon-17 position allows the compound to survive first-pass hepatic metabolism. This makes it highly orally bioavailable, but significantly increases its strain on the liver.
- 2-methyl group: The addition of a methyl group at the carbon-2 position greatly increases its anabolic strength, resulting in a compound with an exceptionally high anabolic-to-androgenic ratio (400:20).
Because of these changes, Methyldrostanolone does not aromatize into estrogen. Users can expect rapid, dry gains with zero water retention, making it an excellent compound for lean bulk or contest preparation cycles.
Expected Results & Benefits
When utilizing Methyldrostanolone within a structured bodybuilding protocol, athletes typically report the following results:
- Dry Muscle Accumulation: Since there is no conversion to estrogen, the muscle gains are lean, dense, and highly defined, without the soft, watery appearance associated with compounds like Dianabol or Anadrol.
- Explosive Strength: Users frequently report massive increases in training capacity and lifting strength within the first 7 to 10 days of starting a cycle.
- Intense Muscle Fullness & Vascularity: The compound drives significant glycogen storage inside muscle cells, creating a highly cosmetic, full, and vascular look even during a caloric deficit.
Optimal Dosage Guidelines
Due to its extreme potency, the margin between an effective dosage and severe side effects is exceptionally narrow. The following dosages represent standard practices within the strength community:
| Experience Level | Daily Dosage | Dosing Protocol |
|---|---|---|
| Beginner | 10 mg/day | Taken once daily with a meal (AM). |
| Intermediate | 20 mg/day | Split into two 10 mg doses (AM/PM) to maintain stable blood levels. |
| Advanced | 30 mg/day | Split into 10 mg or 20 mg doses. Doses above 20 mg carry high risk. |
WARNING: Daily dosages exceeding 30 mg are highly toxic and should be avoided under all circumstances.
Methyldrostanolone Cycle Length & Administration
The gold standard Methyldrostanolone cycle length is strictly limited to 3 to 4 weeks. Because of its intense hepatotoxicity, running the compound for 5 weeks or longer is highly dangerous and almost always leads to severe liver strain, cholestasis, and extreme lethargy.
It is commonly used as a "kickstart" at the beginning of a longer injectable cycle (such as Testosterone and Masteron) or during the final weeks of a contest prep cycle to harden the physique. It should never be run as a standalone oral cycle without a testosterone base, as natural testosterone shutdown will occur rapidly, leaving the user with zero estrogen and severe lethargy.
Side Effects & Risk Management
Managing risks during a Methyldrostanolone cycle requires diligent preparation, bloodwork, and on-cycle support:
- Hepatotoxicity (Liver Stress): As a 17α-alkylated steroid, it places severe stress on the liver, leading to elevated ALT/AST enzymes and potential cholestasis (impaired bile flow). On-cycle support with 500 mg/day of TUDCA and 1200 mg/day of N-Acetyl Cysteine (NAC) is mandatory.
- HPTA Suppression (Shutdown): Methyldrostanolone will completely suppress natural hormone production. A comprehensive Post-Cycle Therapy (PCT) using SERMs such as Clomid (clomiphene) or Nolvadex (tamoxifen) is required starting immediately after the cycle.
- Cardiovascular Strain: It heavily suppresses HDL (good cholesterol) and elevates LDL (bad cholesterol), while promoting water-free vascular constriction that raises blood pressure. A clean diet high in Omega-3 fatty acids and regular cardiovascular monitoring are crucial.
- Androgenic Effects: Acne, accelerated male pattern baldness, and oily skin are common, especially in individuals genetically predisposed to androgenic sensitivity.
Methyldrostanolone vs Drostanolone (Masteron)
| Feature | Methyldrostanolone (Superdrol) | Drostanolone (Masteron) |
|---|---|---|
| Administration | Oral (tablets) | Injectable (oil-based) |
| Hepatotoxicity | Extremely High (requires TUDCA) | None |
| Standard Cycle Length | 3–4 weeks | 8–12 weeks |
| Estrogen Aromatization | None | None (acts as anti-estrogen) |
Where to Go Next
- Explore our oral steroids category for legal, high-quality alternatives.
- Browse our health products catalog for liver support supplements like TUDCA.
- Learn more about post-cycle recovery in our Post Cycle Therapy (PCT) Guide.