Imodium (loperamide) is an over-the-counter drug that’s used to treat symptoms of diarrhea. As with other drugs, Imodium can cause side effects, such as constipation, drowsiness, and dizziness. More ...

Over-the-counter (OTC) drugs are typically considered safe when taken at the recommended doses. But take the right amount for a little too long, and you could run into some unexpected side effects.

Loperamide, a non-prescription antidiarrhoeal with μ‐opioid receptor agonist properties, has long been considered safe when used at therapeutic doses. However, there is increasing evidence that its ...