Alterations in the metabolic profile are one of the main consequences of the use of drug therapies in psychiatric patients. In particular, dysfunction of the metabolic profile (lipid and glycidic) is very frequent in patients taking antipsychotics, especially second-generation ones, and antidepressants. Similar alterations, albeit, to a lesser extent, were highlighted with the use of mood stabilizers. There are some clinical conditions in which clinicians add antipsychotics and mood stabilizers. Our study analyzed this interaction in 116 inpatients. Data showed an overall increase in metabolic parameters in all patients analyzed. However, no statistically significant differences were found in some subgroups of patients. The correlation between metabolic alterations and cognitive dysfunctions in these patients was also analyzed (not statistically significant).