Mirtazapine is a prescription antidepressant introduced by Organon in 1996, and marketed under the tradename Remeron® (also: Zispin®, Avanza®, Norset®, Remergil®). It is used primarily for the treatment of clinical depression in adults. It has a tetracyclicchemical structure and is a white to creamy white crystalline powder, distributed in tablets of 15mg, 30mg, and 45mg.
Mirtazapine is chemically unrelated to other antidepressants. It is thought to work by blocking presynaptic alpha-2 adrenergic receptors that normally inhibit the release of the neurotransmittersnorepinephrine and serotonin, thereby increasing active levels in the synapse. Mirtazapine also blocks post-synaptic 5-HT2 and 5-HT3 receptors—an action which is thought to enhance serotonergic neurotransmission while causing a low incidence of side effects.
The side effects that do occur are thought to be primarily related to the blockage of histamine receptors, which decreases with higher dosages. These side effects may include:
Remeron (mirtazapine), manufactured by Organon Inc., is a new antidepressant medication that was cleared by the FDA for the treatment of depression in June 1997.
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