What medications cause nausea?

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Nausea is the most common medicine side effect of all, and some drugs are famous for it. MedlinePlus names medical treatments including glutides, the GLP-1 family used for diabetes and obesity, cancer chemotherapy, and radiation among the causes, and adds drugs such as opioids to the list. The everyday regulars beyond those: iron supplements, many antibiotics, metformin, antidepressants in the first weeks, and high-dose vitamins on an empty stomach. The mechanisms differ: GLP-1 drugs slow stomach emptying, opioids trigger the brainstem vomiting center directly, and iron irritates the stomach lining. What actually helps: take the drug with food when the label allows, since an empty stomach amplifies most of these; start low and titrate slowly where that is an option, which is how GLP-1 drugs are designed to be started; split iron doses or take them with a small snack despite the absorption trade-off if nausea is the alternative to taking them at all; and ask about anti-nausea cover for the predictable cases, since chemotherapy and opioids both have standard antiemetic pairings. The two rules that override the rest: tell the prescriber before abandoning the drug, because most families have a gentler member; and get seen for vomiting that prevents keeping any medicine or fluid down, since dehydration and missed doses become the real risks fast.

What medications cause nausea?

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