An antidepressant is a type of drug that is used to treat symptoms of depression

Before the invention of antidepressants, doctors around the world believed that psychotherapy was the only way to treat depression

In 1952, doctors realized that this drug not only treated tuberculosis but also improved the mood of the patients who used that drug

After a lot of research, it was found that iproniazid and imipramine, affected a group of neurotransmitters called monoamines

Neurotransmitters are molecules present inside the human body that acts as chemical messengers between different cells in the body

A synapse is a small space between two cells, where messages are passed from one cell to the other

It was found that one monoamine was most important among others and any antidepressant that targeted this monoamine was the most effective

Antidepressants change the monoamine levels present in the brain, and patients experience the benefit of it after some time