PRL and Increased circulating prolactin concentration: Typical antipsychotics were reported to have higher occurrences of elevated serum prolactin levels (hyperprolactinaemia) in comparison with atypical antipsychotic users (Madhusoodanan et al., 2010; Manu, 2012; Vuk Pisk et al., 2019; Dehelean et al., 2020).