Is he starting a new medication? Sinemet can cause slight nausea. My movement specialist suggests eating a carbohydrate when taking Sinemet (i.e., a half-slice of bread).

I was vomiting everyday too with constipation also. The meds were to much for me. Drinking Vernors ginger soda really helps settle my stomach and soups that are light and brothy are good. But do see your neurologist asap

If you have chronic constipation as I do, vomiting frequently when trying to eat is my indication to get to the hospital. Its a sign of bowel obstruction which can lead to sepsis.

Nausea is my world, and I take sinemet. I vomit too.

Sinemet really made me nauseous when the dosage was increased! I also throw up. The doctor lowered the dosage today. I hope it helps