You will be instructed not to eat solid food for at least eight hours before the procedure. During this time you may drink clear liquids. This may help ensure optimal visualization of walls of your digestive tract, thereby providing better diagnosis. It will also help achieve the fastest capsule passage and facilitate loose stools for easier retrieval of the capsule, thereby providing better diagnosis. Your doctor will provide you with specific instructions on preparation. It is important to follow these instructions to prevent repeating the procedure.