I de kliniske undersøgelser var de hyppigste bivirkninger ved Byetta (som ses hos flere end 1 ud af 10 patienter) for lavt blodsukker (når det blev taget sammen med et sulfonylurinstof), kvalme, opkastning og diarré.
In clinical studies, the most common side effects with Byetta (seen in more than 1 patient in 10) were hypoglycaemia (when it was taken with a sulphonylurea), nausea (feeling sick), vomiting and diarrhoea.