[Methamphetamine use in chemsex and its consequences on mental health: a descriptive study.].

Objective: Chemsex is a term applicable to the use of drugs related to sex among men who have sex with men (MSM). Because it is a recent trend, there is little information about its management and consequences. The aim of the study was to describe the clinical profile of a sample of chemsex users who consulted for treatment.

Methods: This is a longitudinal and retrospective study of 53 patients who consulted for chemsex in an addiction unit of a general hospital in Barcelona, from January 2017 to June 2019. Data was collected from electronic medical records and a descriptive analysis was performed by calculating proportions and means.

Results: The most common drug used in chemsex was methamphetamine (81.1%; n=43) and 67.4% (n=29) of these used at least other two drugs. The prevalence of HIV infection was high (71.2%; n=37) and 72.1% (n=41) had psychiatric comorbidity, being the most common psychosis (37.2%; n=16).

Conclusions: Methamphetamine was the most common drug chemsex user's seeked for treatment. Furthermore, there is a high prevalence of HIV diagnosis in this population. Both conditions can enhance the risk of suffering from psychosis and may explain why psychiatric comorbidity is so high in the sample.