Chemical structure of the TeCA mirtazapine. Notice its four rings fused together.<unk> s (TeCAs) are a class of antidepressants that were first introduced in the 1970s. They are named after their<unk>  chemical structure, containing four rings of atoms, and are closely related to the tricyclic antidepressants <unk> s), which contain three rings of atoms.
Tetracyclic antidepressant
Tricyclic antidepressant
Atypical antidepressant
Heterocyclic antidepressant
Second-generation antidepressant
Antipsychotic
Atypical antipsychotic
Antipsychotic ester