Antidepressant effect of Diphenhydramine?


Question:
Is it serotonergic? How much Diphenhydramine is equal to Fluoxetine 10mg? Which are the neurotransmitters affected? Does this drug help in withdrawal symptoms of SSRIs? Detailed information of Diphenhydramine related with Neuropsychiatry will be appreciated.
Please give me web addresses that give information related to this

Answers:
In the 1960s it was found that diphenhydramine inhibits reuptake of the neurotransmitter serotonin. This discovery led to a search for viable antidepressants with similar structures and fewer side effects, culminating in the invention of fluoxetine (Prozac), a selective serotonin reuptake inhibitor (SSRI). A similar search had previously led to the synthesis of the first SSRI zimelidine from chlorpheniramine, also an antihistamine.
Diphenhydramine is an over-the-counter sleep aid that also has uses as an antihistamine, but I've never heard of it being touted as an antidepressant.


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