Description
Overview
Mild DHT-derived anabolic; non-aromatizing; favored for lean tissue with low estrogenic activity.
Composition / Profile
- Active compound: Methenolone (Primobolan)
- Drug class: Anabolic steroid (DHT-derivative)
- Pack / dose (this listing): 10ml / 100mg
Format
- Oil-based (or aqueous, where noted) solution for intramuscular injection
- Pack / dose: 10ml / 100mg
Dosage & Usage Patterns
- Bodybuilding (commonly cited): Commonly cited: injectable enanthate ~400–600 mg/week; oral acetate ~50–100 mg/day (higher doses needed due to low bioavailability).
- Clinical / general reference: Individual; injectable enanthate dosed weekly, oral acetate has low bioavailability so needs higher oral doses.
- Half-life: Injectable enanthate ~4.5-5 days; oral acetate short.
- Protocols vary by individual, compound stack, and bloodwork — figures above reflect community-reported patterns, not medical recommendations.
Effects
Reported benefits (commonly cited)
- Lean tissue preservation with minimal water retention.
- Mild anabolic suitable for cutting or ‘quality’ gains.
- Low estrogenic activity.
Reported side effects
- Comparatively mild.
- Androgenic effects (hair loss in predisposed), lipid changes.
- Heavily counterfeited.
Key Interactions
- Non-aromatizing.
Post-Cycle Considerations
- Suppresses the axis (milder is still suppressive).
Precautions
- Frequently faked due to cost.
- Oral form is not 17-aa but is poorly bioavailable.
Common Misconception
Myth: Primo is ‘weak and useless.’
Evidence: it is mild per mg, but it is a legitimate anabolic; the bigger real-world issue is counterfeits.
Related Categories
- Browse more in Injectable Steroids → Methenolone (Primobolan).
- Related: Post Cycle Therapy (PCT), Anastrozole, Tamoxifen.
Storage
- Store away from direct light and extreme temperature
- Oil-based solutions can be drawn more easily when warmed slightly before injection






Reviews
There are no reviews yet.