Generally, no special preparation is required for performing MRI scans without injections. After the completion of examinations and undergoing an MRI, individuals can carry out their normal activities. However, if a sedative has been used during the tests, the individual should wait for a while until the effects of these medications wear off. If a contrast agent has been used during the test, the patient should drink a significant amount of water after the examination so that the contrast material can be eliminated from the body.