Abstract Background Psychiatric patients face aggravated physical health issues and reduced life expectancy, primarily due to premature cardiovascular diseases. The intricate relationship between lifestyle factors, illness, and psychotropic medications contributes to this phenomenon. The focus of this research is to evaluate weight management interventions for individuals with Severe Mental Disorders through a comprehensive scoping review, focusing on diverse study designs, outcomes, and their clinical implications. Methods 20 studies were analyzed to understand the effectiveness of interventions and characteristics, such as duration, delivery, and professional involvement. Assessment criteria included weight modifications, BMI changes, and metabolic measures like blood pressure and lipid profiles. Results The total number of participants included in the 20 studies evaluated was 3886. All trials included individuals of all genders. The studies included patients with a weighted mean age of 44.37 (SD = 4.72) and a mean BMI of 34.7 kg/m2 (SD = 3.56). Varied interventions, mostly conducted in the US, showed promising weight reduction and cardiovascular risk management results among psychiatric patients. However, disparate methods used in the studies hindered the evaluation of outcomes. The studies which yielded more interesting results included Gaughran F. et al, 2017 who showed improvements in HDL cholesterol and metabolic indicators, (HR 0.085; 95% CI:0.007-0.16), and Bartels S. et al, 2015 who reported that 51% of participants achieved clinically significant reduction in overall cardiovascular risk. Conclusions Although interventions displayed potential benefits for beneficiaries, the lack of standardized protocols and non-uniform endpoints poses challenges in effectively addressing weight-related concerns in psychiatric patients. Clear guidelines and standardized assessments are necessary to implement psychiatric patients’ weight management interventions. Key messages • The health issues and reduced life expectancy of psychiatric patients is a major health burden. The mean BMI of 34.7 kg/m2, indicating a prevalence of Obese individuals needs to be addressed. • Psychotropic medications are associated with increase in weight. More effort in increasing awareness and including mandatory nutritional educational classes when prescribing these drugs is needed.