<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 fasting for 12 hours prior to the procedure, taking laxatives if needed, and not drinking any liquids for two hours before the test. You may also need to stop taking certain medications that could interfere with the test results. It is important to inform your doctor about all of your current health conditions and medications so they can make sure everything is safe for the procedure.