Rapine 15 mg Tablet contains Mirtazapine, a tetracyclic antidepressant manufactured by ACI Limited. It is primarily used for the treatment of major depressive disorder (MDD). Mirtazapine works by enhancing central noradrenergic and serotonergic activity through blockade of central presynaptic adrenergic alpha-2 receptors, which is believed to contribute to its antidepressant effects