Risk factors for psychotropic-induced SIADH include older age, female sex, comorbid heart/kidney/liver failure, low body weight, hypothyroidism and hx of hyponatremia from any cause. Higher doses of SSRI's are more likely to cause SIADH, but this relationship does not appear to be true of antipsychotics.

Publication reference : De Picker L, Van Den Eede F, Dumont G et al. Psychosomatics 2014; 55: 536-547
Reference URL: https://pubmed.ncbi.nlm.nih.gov/25262043/
Publication reference : Muelendijks D, Mannesse CK, Jansen PA. Drug Saf 2010; 33: 101-114
Reference URL: https://pubmed.ncbi.nlm.nih.gov/20082537/