Xerostomia i.e., dry mouth is a common side effects of many pharmacological agents. The class of drugs most commonly associated with xerostomia are: - Diuretics - Beta-blockers - Antihistamines - Anticonvulsants - Tricyclic antidepressants - Antipsychotics - Oral morphine Reference: https://www.nps.org.au/australian-prescriber/articles/xerostomia-a-common-adverse-effect-of-drugs-and-radiation Image via: https://healthjade.net/dry-mouth/