In this episode, I discuss loperamide (Imodium) pharmacology, adverse effects, and drug interactions.



Loperamide has opioid-type activity in the gut but has extremely low oral bioavailability. This allows it to be used for diarrhea but at lower doses won't cause systemic opioid-like effects.



Loperamide abuse has been reported. Excessive dosages can increase the risk of cardiac arrest and other cardiovascular concerns.



Medication causes of diarrhea should be ruled out prior to starting a medication like loperamide. I discuss numerous medications that can cause diarrhea in this podcast.