The answer is E – valproic acid, with the majority of cases involving children. Among antipsychotics, clozapine, olanzapine, quetiapine, and risperidone have been associated with the greatest number of cases of drug induced pancreatitis, and haloperidol, ziprasidone, and aripiprazole with the fewest. Mirtazapine has been linked to cases, whereas cases associated with bupropion, venlafaxine, and SSRIs have been infrequently reported.

Publication reference : Crone CC, Lackamp JM, Alkis AR. Gastrointestinal Disorders. In: Levenson JL, ed. The American Psychiatric Association Textbook of Psychosomatic Medicine and Consultation-Liaison Psychiatry. Third ed. Washington DC: American Psychiatric Association Publishing; 2019:527-569.
Publication reference : Gerstner T et al, J Gastroenterol 2007; 42: 39-48
Reference URL: https://www.ncbi.nlm.nih.gov/pubmed/17322992