Nocturia is an annoying and potentially damaging symp-tom affecting a significant proportion of the adult popula-tion; it occurs with increasing prevalence in both sexeswith age. As nocturia disturbs sleep, it may give rise toadverse consequences [1]. This paper focuses on sleep,nocturia and the effect of nocturia on daytime function-ing; it will also consider the potential effect on sleep pat-terns of the treatment of nocturia caused by nocturnalpolyuria