Pharmacology CMS Practice Test

Colesevelam works by binding bile acids in the gut, which are released in greater amounts after a meal. Taking it with meals ensures the drug is present in the intestine when bile acids are secreted, maximizing its ability to bind them and lower LDL cholesterol. A full glass of water helps the medication move through the GI tract and reduces the risk of constipation. Taking it on an empty stomach would miss the peak of bile acid secretion and lessen effectiveness. So the correct guidance is to take colesevelam with meals and with an adequate amount of water.