Aims To estimate the prevalence of self-reported pharmacological neuroenhancement (PNE) with prescription or recreational drugs among the Swiss general population and correlates of PNE. Design A population-based crosssectional study using a self-administered online survey. Setting A telephone-recruited highly representative Internet Panel in Switzerland. Participants A total of 10 171 Swiss employees and students (unweighted N = 10 084) aged 15 to 74 years (mean age: 39.1 ± 13.3; 46.6% female). Measurements Self-reported lifetime, pastyear, and past-month use of prescription or recreational drugs for PNE, motives for use, and correlates of PNE including socio-demographic, health, and recreational drug use characteristics. Findings The lifetime prevalence of PNE was 4.0% (95% CI = 3.62, 4.38), and the past-year prevalence was 2.1% (95% CI = 1.82, 2.38). Lifetime pharmacological mood enhancement (3.1%; 95% CI = 2.76, 3.44) was more prevalent than pharmacological cognitive enhancement (1.4%; 95% CI = 1.17, 1.63). Fifty-four participants reported both (0.5%; 95% CI = 0.36, 0.64). PNE was associated with studying rather than full-time (