Contraindications: Do not use Nassatropin if you have active or suspected malignancy, untreated hypothyroidism, diabetic retinopathy, acute critical illness, or any intracranial lesion. The GH–insulin combination is absolutely contraindicated in individuals with Type 1 or Type 2 diabetes mellitus, prior hypoglycaemic episodes, or who inject alone without trained supervision.
Side Effects: Exogenous somatropin may cause fluid retention in peripheral tissues, joint discomfort at high doses, and dose-dependent changes in insulin sensitivity. The insulin component introduces acute hypoglycaemia as the dominant acute risk; symptoms include confusion, diaphoresis, and rapid heartbeat. Prolonged stacking at high GH doses may suppress endogenous pituitary GH pulsatility.
Monitoring: Continuous or daily blood glucose monitoring is non-negotiable during any GH–insulin protocol. HbA1c and fasting glucose should be checked at cycle start, midpoint, and end. IGF-1 levels should be measured at baseline and again at 4–6 weeks into stable dosing; results guide whether doses remain appropriate or require adjustment.
PCT: Insulin must be tapered to zero before GH is discontinued. After the full GH cycle ends, allow 2–4 weeks for endogenous pituitary GH secretion to recover. If anabolic steroids were used concurrently, standard SERM-based PCT applies independently; somatropin taper does not substitute for androgen-axis recovery protocols.