“…We read with great interest the comment pertaining to our review article on primary polydipsia in the medical and psychiatric patient [1,2]. Dr Branimir Margetić underlines the importance of hyponatraemia induced by primary polydipsia in the psychiatric setting [2]. Indeed, primary polydipsia has mainly been described in the psychiatric setting [3] and is associated with increased morbidity and mortality [4,5].…”