S E B has been deemed safe for long-term use. Avoid operating heavy machinery while under the influence of S E B. One should not attempt to drive a vehicle while taking S E B. Some S E B users may experience light-headedness or exhibit narcoleptic symptomology. Do not suddenly stop listening to S E B. Side-effects of S E B may include; sleep, sleep, drowsiness and sleep. Please consult your Oneirologist if S E B persists for longer than four days.