If a client reports for a scheduled EEG, they may need additional prep for the test if they are experiencing any of the following symptoms: headaches, dizziness, trouble sleeping, or seizures. Additionally, if the client is taking any medications that may interfere with the test, they should be prepared to inform the technician prior to the exam. If the client is unsure if their medications may interfere with the test, they should consult their doctor or pharmacist for more information.