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.
The SSRIs include drugs such as Prozac, Zoloft, and Paxil. The SSRIs act on a chemical in the brain called serotonin. Serotonin helps regulate mood, but it also plays a role in digestion, pain, sleep, mental clarity, and other bodily functions. As a result, the SSRI antidepressants cause a wide range of side effects.