Why does metformin make me nauseated?

Brooke Randolph
Marriage & Family Therapy
It appears that some people may be terminating metformin, a medication commonly prescribed for diabetes, due to complaints of nausea, stomach pain, and unpleasant after-taste. It appears the nausea is more a result of the smell of the medication than a side-effect of the drug. Eau de metformin has been described as fishy, rotten, or like a sweaty sock. Luckily, the coating on the extended-release tablets seems to protect patients from that smell.

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