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Some serotonin releasing agents, serotonin reuptake inhibitors, and/or serotonin 5-HT 2C receptor agonists, such as fenfluramine, dexfenfluramine, chlorphentermine, sibutramine, and lorcaserin, have been approved and used as appetite suppressants for purposes of weight loss in the treatment of overweightness or obesity.
Other Conditions That Can Cause Appetite Loss. Sudden and major changes in your appetite, eating habits, and weight can also be symptoms of depression — a common mood disorder that shares many ...
Severe weight loss is very uncommon though. Loss of appetite is very temporary and typically comes back as daily effects of stimulants wear off. Nausea, dizziness, and headaches, other side effect, can also indirectly affect appetite and result in weight loss. [194]
In the brain, serotonin is a neurotransmitter and regulates arousal, behavior, sleep, and mood, among other things. [9] During prolonged exercise where central nervous system fatigue is present, serotonin levels in the brain are higher than normal physiological conditions; these higher levels can increase perceptions of effort and peripheral muscle fatigue. [9]
A serotonin releasing agent (SRA) is a type of drug that induces the release of serotonin into the neuronal synaptic cleft. A selective serotonin releasing agent (SSRA) is an SRA with less significant or no efficacy in producing neurotransmitter efflux at other types of monoamine neurons, including dopamine and norepinephrine neurons. [1]
The 7 general serotonin receptor classes include a total of 14 known serotonin receptors. [9] The 15th receptor 5-HT 1P has been distinguished on the basis of functional and radioligand binding studies, its existence has never been definitely affirmed or refuted. [10] [11] The specific types have been characterized as follows: [12] [13] [14]
Serotonin levels within the synapse drop, then rise again, ultimately leading to downregulation of post-synaptic serotonin receptors. [183] Other, indirect effects may include increased norepinephrine output, increased neuronal cyclic AMP levels, and increased levels of regulatory factors such as BDNF and CREB. [184]
One effect of 5-HT 2A receptor activation is a reduction in intraocular pressure, and so 5-HT 2A agonists can be useful for the treatment of glaucoma. This has led to the development of compounds such as AL-34662 that are hoped to reduce pressure inside the eyes but without crossing the blood–brain barrier and producing hallucinogenic side ...