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Serotonin is an anorexient neurotransmitter. But if I am right, antidepressant drugs like SSRIs increase the amount of serotonin in the brain.

So why do antidepressants increase body mass if serotonin is an anorexient?

Edit : You can find here that antidepressants are associated with weight gain : https://www.medicalnewstoday.com/articles/319527

https://www.mayoclinic.org/diseases-conditions/depression/expert-answers/antidepressants-and-weight-gain/faq-20058127

https://www.webmd.com/depression/features/antidepressants-weight-gain#1

I also was taught that in a pharmacology class.

Edit2 : What I found is one reason is that the improvement in mood as a cause of these drugs may lead to an improvement in apetite and thus weight gain, but is this the only reason?

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