Not true. It is more important to go to bed at the same time and wake up at the same time everyday. Not everyone needs eight hours. In fact, if I get eight hours sleep I usually feel tired and groggy for the entire day.
Many drugs affect the release, arrest and efficacy of serotonin, including antidepressants, psychedelic hallucinogens, synthetic opiates, dissociatives, drugs for treating migraines, antihistamines, and stimulants such as MDMA.
1 Use of two or more serotonergic medications (meaning medications that increase serotonin levels) 2  Overdose of a single serotonergic medication.  Increasing the dose of a single serotonergic medication.