Abstract:Although the relation between enuresis (NE) and ADHD is frequently reported in the literature, the disparity among the results among several studies raises hypothesis to justify this; distinctions of types of ADHD help to understand these differences. Models for explanation of the co-occurrence, raised in a non-exhaustive literature review are displayed and analyzed in this paper as well as the report of impairments to treatment in children with nocturnal enuresis plus ADHD. The present study compares full spectrum alarm treatment plus management of other complaints besides NE (as requested by participants) of a sample of two groups of Brazilian children: with nocturnal enuresis plus ADHD (EG) versus nocturnal enuresis only (CG), searching for differences in the initial success criteria achievement time and adherence (measured directly by rate of dropouts and indirectly by lack of information from patients and by requests for management of other complaints, besides NE. With homogeneity regarding socio-demographic and clinical variables between pretreatment groups and leaving both groups free to ask for management of other complaints, no differences were observed in treatment results or time to acquire control. Comorbidity implied only in a higher proportion of lack of information from the patients. Only this indirect measure of adherence implied more failures on the treatment independently of the comorbidity.