drugs
Overview of Adverse Drug Reactions
Common adverse drug reactions
Digestive disturbances—loss of appetite, nausea, a bloating sensation, constipation, and diarrhea—are particularly common adverse drug reactions, because most drugs and medications are taken by mouth and pass through the digestive tract. However, almost any organ system can be affected. In older people (see Aging and Medications ), the brain is commonly affected, often resulting in drowsiness and confusion. 