There may be some reduction in the volume of your stools. That's normal after a decrease in food intake, because you eat less fiber. This should not cause severe problems. If difficulties do arise, check with your doctor. He or she may suggest you take a mild laxative and drink plenty of water for a while. Drinking plenty of water is a good idea, anyway. Your needs will vary, but you should drink at least 6-8 glasses of water a day.

Constipation is not a recognized side effect of NDI. However, there have been many anecdotal reports of young children with NDI who also have constipation. Constipation can be helped by increasing the fiber in his diet (prune juice or prunes).