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[43] [44] Prolonged-release melatonin is safe with long-term use of up to 12 months. [11] Although not recommended for long-term use beyond this, [ 45 ] low-dose melatonin is generally safer, and a better alternative, than many prescription and over-the-counter sleep aids if a sleeping medication must be used for an extended period of time.
Before considering melatonin, he tells his patients to work on improving their sleep by giving themselves time to wind down at the end of the night, exercising during the day, meditating and ...
The popular sleep aid can have side effects.
Melatonin supplements can lull you to sleep on restless nights, but too much may lead to more rest disruption; here's what sleep experts say about proper dosage for adults and children.
During the night, melatonin regulates leptin, lowering its levels. Cetaceans have lost all the genes for melatonin synthesis as well as those for melatonin receptors. [83] This is thought to be related to their unihemispheric sleep pattern (one brain hemisphere at a time). Similar trends have been found in sirenians. [83]
Symptoms typically only fully resolve once a normal sleep schedule is resumed. [40] Many night workers take naps during their breaks, and in some industries, planned napping at work (with facilities provided) is beginning to be accepted. A nap before starting a night shift is a logical prophylactic measure.
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Large doses of melatonin can even be counterproductive: Lewy et al. [48] provide support to "the idea that too much melatonin may spill over onto the wrong zone of the melatonin phase-response curve." The long-term effects of melatonin administration have not been examined. In some countries, the hormone is available only by prescription or not ...