These behaviors are known to benefit health in many other ways, namely lowering the risk of obesity, diabetes and heart disease and improving mood.

In one study, people with diabetes had more trouble processing information, remembering things, and paying attention — besides being in a bad mood — when their blood sugar was low.

Common offenders include some antidepressants like Paxil and Zoloft; mood stabilizers; diabetes drugs; blood pressure agents; steroids; antiseizure drugs; certain hormones; and antihistamines.