Introduction Vasculotoxic envenomation is an uncommon cause of hypopituitarism. Most described cases have varying extent of anterior pituitary dysfunction, but posterior pituitary involvement is extremely rare. Methods Clinical, biochemical and radiologic evaluation of a young female who presented with secondary amenorrhoea was performed. A brief literature review of envenomation-induced hypopituitarism is included. Results A 26-year-old female presented with secondary amenorrhoea since the age of 20. She had normal stature. Her past medical history was significant for vasculotoxic snakebite 12 years back requiring hemodialysis, but no hormonal testing was done at that time. Current evaluation showed anterior hypopituitarism. Insulin-induced hypoglycemia test confirmed deficiencies of cortisol and growth hormone axes (peak values 348nmol/l and 0.03ng/ml). There was no diabetes insipidus. MRI revealed a hypoplastic anterior pituitary with an ectopic posterior pituitary. In view of normal stature and secondary amenorrhoea, a diagnosis of envenomation-induced hypopituitarism with ectopic posterior pituitary (EPP) was made. Brief literature review of envenomation-induced hypopituitarism showed both acute and delayed presentation, male predominance, variable lag period (weeks to years). Nearly half of all patients were asymptomatic. The most common axis involved in acute presentation was the cortisol axis, whereas thyroid and gonadotroph axes were commonly involved in delayed hypopituitarism. Conclusion Vasculotoxic envenomation is a rare cause of acquired hypopituitarism. EPP in the index case was probably due to the “axonal dieback” phenomenon and subsequent regeneration of the axons at a more caudal site. This case, being the first instance of acquired EPP following envenomation, expands the spectrum of envenomation-induced hypopituitarism.