first of all ssri are instantly raising the serotonin in couple of hours way above than normal people have thus the midriasis and weird feeling reports from the first day. i dunno why but it has to do with downregulation of serotonin receptors through over exitment of serotoninergic that helps depresed people (or its just a side effect and reason ssris stop work but some theory explains why ssri take long to kick in is cause of them must downregulate the receptors which takes weeks).it also have to do with depression itself which takes alot of work to be treated no depresed person took a drug and suddenly felt better maybe he get high but with shitty psychology it might even feel weird. personally i feel the effect of an ssri within an hour).the resaon for not pronounced euphoria like mdma is that mdma is also weak maoi a relising agent of all three neurotransmiters and for the euphoria dopamine is responsible not serotonin execcive serotonin brings the psychedelia. and it also makes hormones released oxytosin which is bonding hormone also it has phenyphenilamine mimetic effect which is love exitmeng feeling butterflies in the stomach). serotonin dont gets you high its essential for you to function it coordinates all the neuronal systems it activates them and inhibits them through serotonin - melatonin system melatonin inhibits seratonin activates lack of seratonin leads to lack of melatonin resulting in poor activation and poor deactivation thus lack of energy poor sleep and motivation thus deepresion . but careful high seratonin wont make you jittery cause its not its function to make you so it acctually inhibits overexitment and overcatatony.. its an regulator so if you have too litle the other systems wont respond very well , thus as a depresed person you wont secrete normal amounts of dopamine to plesurable stimuli wont fight flight well thus the lack of apetite in depressed person and etc . you dont need an exes of serotonin you need the right amount cause to much has toxic and weird effects i havent studied well.
now depression , actually depression dosent come from lack of seratonin but the lack of seratonin from depression .. depression ocurrs when something is wrong in our enviroment ussually simply lack of love (loss, no reletionship , lack of friends ,haters ,) which is considered poorly stimulating enviroment poorly stimulating enviroments make us secrete less neurotransmiters through our way of life . a person without love wont take care of him/her self wont eat properly,dont have goals goals are very important to have high neurotransmiter levels even with malnutrion etc which dosent help neurotransmiters to be made properly , also not making much of them is our body way to tell us u doing wrong (it says i want friends , i want sex , i need to be loved if im not i dont need to exist im not needed am obsolete im evolutions failed object nobody even chooses me for reproduction thus i need to die , thts the subcocious mindworks, ) why?? cause through love we survive ... if our mother wouldnt love us feed us etc mothers does we would die .thus depression slowly simply kill us , infants which havent being stroked or hugged die . so simply by increasing serotonin you will have more energy and sleep better but it wont make you feel loved - thus why after months you get better because most probably through this help in sleep and motivation you acctually finds somebody to love and be loved by .
many of things i said might be incorect...
/ sorry my english is not very good i have other 2 primary langueges am still learning english