contraindications: Contraindicated in individuals with confirmed or suspected androgen-sensitive tumours (prostate, breast).
Not indicated for use in women of childbearing potential or during pregnancy due to virilisation risk.
Avoid in patients with uncontrolled polycythaemia, severe hepatic impairment, or active thromboembolic events.
The elevated opening dose in a frontload protocol intensifies all contraindication risks — medical screening prior to initiation is strongly recommended.
side_effects: Oestrogen-related: water retention, gynaecomastia — aromatisation risk increases proportionally with the higher serum testosterone concentrations produced by frontloading.
Androgenic: acne, accelerated scalp hair thinning, increased sebum production — more pronounced during the loading phase peak.
Cardiovascular: haematocrit elevation; erythrocytosis risk is higher with supraphysiological peaks; full blood count monitoring is advised at week four.
Endogenous suppression of the HPG axis begins within days of the first dose and is essentially complete by the end of the frontload phase.
monitoring: Serum total testosterone, LH, FSH, and haematocrit should be assessed before the cycle and at week four.
Oestradiol (E2) should be monitored at the peak-loading phase (day 7–10) as aromatisation parallels testosterone concentration.
Liver enzymes (ALT, AST) provide baseline reference despite the injectable route bypassing first-pass hepatic metabolism.
Blood pressure measurement is recommended throughout, particularly during the high-concentration early weeks.
pct: Initiate SERM-based PCT (tamoxifen or clomiphene) no earlier than three to four weeks after the final injection, allowing the decanoate fraction to clear.
A standard PCT duration of four to six weeks is appropriate following cycles that included a frontload phase.
hCG administered during the cycle's final two weeks can mitigate testicular atrophy severity and improve PCT responsiveness.
Do not begin PCT while serum testosterone remains elevated — bloodwork confirmation of baseline approach is the most reliable trigger.