Contraindications: Methandienone injection is contraindicated in individuals with confirmed or suspected androgen-sensitive prostate carcinoma, breast carcinoma (male), pre-existing hepatic impairment, hypercalcaemia, or nephrotic syndrome. Pregnancy and lactation are absolute contraindications. Individuals under 21 years of age should not use this product due to risk of premature epiphyseal closure.
Side Effects: AR activation by methandienone drives dose-dependent side effects including fluid retention (oedema) from aldosterone-pathway stimulation, oestrogen-mediated effects (gynaecomastia, water retention) resulting from aromatase conversion, and suppression of endogenous LH/FSH via hypothalamic-pituitary-gonadal (HPG) axis feedback. The 17α-methyl group imposes hepatotoxic risk detectable via elevated ALT/AST on liver function panels. Androgenic effects — including accelerated male-pattern hair loss and acne — may occur despite the reduced 5α-reductase susceptibility inherent to the Δ1 structure.
Monitoring: Liver function tests (ALT, AST, bilirubin) should be conducted at baseline and at 4-week intervals during use. Haematocrit, haemoglobin, and lipid panel (LDL/HDL ratio) monitoring is recommended every 6–8 weeks. Blood pressure should be self-monitored bi-weekly given the compound's oedema and erythropoietic potential.
PCT: Due to pronounced HPG-axis suppression mediated through AR-driven hypothalamic negative feedback, post-cycle therapy (PCT) is mandatory. A standard protocol employs tamoxifen 20–40 mg/day or clomiphene 50 mg/day, initiated approximately 3–4 days after the final injection (consistent with the short ~4–6 h plasma half-life), for a duration of 4–6 weeks to facilitate LH/FSH and endogenous testosterone restoration.