GLP-1 Drug Interactions Worth Flagging to Your Prescriber
GLP-1 drugs slow stomach emptying, which can change how other oral medications are absorbed. Here's what's typically worth mentioning.
By the GLP Semaglutide editorial team · Last updated September 2, 2025
Because GLP-1 drugs delay gastric emptying, they can slow the absorption of other oral medications, which is relevant for drugs with a narrow therapeutic window or that need to reach peak levels quickly.
Categories worth mentioning
Oral contraceptives, warfarin and other anticoagulants, and insulin or sulfonylureas are commonly flagged in labeling and clinical guidance as worth discussing specifically when starting a GLP-1 drug, alongside any other prescription or over-the-counter medication.
Full medication list, every time
The safest approach is bringing a complete, current medication list to any appointment where a GLP-1 drug is being started or adjusted, rather than guessing which interactions might matter.
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