Contraindications: Oxandrolone is contraindicated in individuals with active hepatic impairment, elevated baseline transaminases (ALT or AST above 2× ULN at pre-cycle screening), prostate or breast carcinoma, hypercalcaemia, and nephrotic syndrome. Concurrent use of anticoagulants such as warfarin requires dose adjustment of the anticoagulant, as Oxandrolone potentiates the anticoagulant effect through CYP2C9 pathway competition — a drug interaction confirmed in pharmacological case literature. Females of reproductive potential should be advised of virilisation risk; 10 mg represents the lowest practicable dose for female users.
Side Effects: Hepatic: ALT and AST elevation in a dose- and duration-dependent pattern; mechanism is cytosolic enzyme leakage under 17α-alkylated compound exposure, not irreversible fibrosis at therapeutic doses and standard durations. Cardiovascular: HDL suppression averaging 21–33% by direct enzymatic assay; LDL elevation is secondary but worsens with cycle length. Androgenic: scalp sensitivity, accelerated follicular miniaturisation in genetically predisposed individuals, mild acne, and increased skin oiliness. Hormonal: partial HPG-axis suppression leading to reduced endogenous testosterone output; recovery is expected within four to six weeks post-cessation based on LH/FSH rebound data from clinical endocrinology studies.
Monitoring: Minimum monitoring schedule: ALT, AST, and lipid panel at baseline; ALT, AST, and HDL at week four; full post-cycle panel (ALT, AST, lipid, LH, FSH, total testosterone) at two weeks post-final dose. Any single ALT reading exceeding 3× ULN is grounds for immediate cycle cessation, not dose reduction. Haematocrit should be checked if cycle duration exceeds eight weeks.
PCT: Post-cycle therapy should begin within 72 hours of the final Oxandrolone tablet. Because HPG-axis suppression from Oxandrolone alone is partial, a SERM-based protocol (clomiphene citrate or tamoxifen) is sufficient in most standalone cycles; the SERM and Oxandrolone operate through mechanistically independent recovery vectors and do not compete. PCT duration should be guided by LH/FSH bloodwork normalisation rather than fixed calendar endpoints.