A 32 year old female with hyperprolactinaemia-galactorrhoea-amenorrhoea due to a right internal carotid artery aneurysm just before its bifurcation is described. She had two episodes of subarachnoid haemorrhage necessitating an emergency internal carotid artery ligation. She responded to bromocriptine treatment with restoration of her menses, normalization of circulating prolactin and disappearance of galactorrhoea.