Agomelatine and bupropion are classified under atypical antidepressant.
Agomelatine is an atypical antidepressant used to treat major depressive disorder. It contains naltrexone, an opioid antagonist, and bupropion, an aminoketone antidepressant. Typical antidepressants include the SSRIs, SNRIs, TCAs, and MAOIs, which act mainly by increasing the levels of the monoamine neurotransmitters serotonin and/or norepinephrine. 
Atypical antidepressants include agomelatine, bupropion, mianserin, mirtazapine, nefazodone, opipramol, tianeptine, and trazodone. 
