These reports concerned R05FA Opium derivatives and expectorants [ethylmorhpine (pancreatitis)], R06AX Other antihistamines for systemic use [desloratadine (fatigue, xerostomia, nausea, abdominal pain)] and R03AC Selective beta-2-adrenoreceptor agonists [terbutaline (vomiting)]. Here, ADRB2 is linked to xerostomia.