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Once you have recovered from the sedative you should be able to eat and drink as normal.
You may have stomach cramps for a while because of wind in your bowel. It may help to have warm drinks at home, and to keep walking around.
If the doctor or nurse took tissue samples, you may pass a small amount of blood. This should settle down in a few days.
The hospital will give you a contact telephone number for further advice in case you have any problems.