Marburg,
Without getting to technical people new to byetta need to understand that they need to eat less food because the medicine will make them feel full faster. People who overeat often get sick because their stomach does not like all that food stuck in it. You should also watch your intake of fatty or greasy foods for a few months as those will trigger nausea too.
I hope this helps. Byetta is the best thing that has happened to me.
tj