<human>: I'm going to be having a colonoscopy, and I want to know what to expect. What should I do to prepare?
<bot>: To prepare for your colonoscopy, you will need to follow the instructions of your doctor or healthcare provider. This may include eating a light meal before the procedure, not drinking any caffeine or alcohol, and avoiding certain medications that can affect the results of the test. It is also important to make sure you are well hydrated before the procedure, so try to drink plenty of water. Additionally, it is recommended that you avoid fiber supplements and laxatives prior to the exam.