phenothiazine

phenothiazine /phe·no·thi·a·zine/ (fe?no-thi´ah-zen) any of a group of antipsychotic agents having a similar tricyclic structure and acting as potent alpha-adrenergic and dopaminergic blocking agents, as well as having hypotensive, antispasmodic, antihistaminic, analgesic, sedative, and antiemetic activity..

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phe·no·thi·a·zine (fn-th-zn)

n.

1. A yellow organic compound used in veterinary anthelmintics. Also called thiodiphenylamine.

2. Any of a group of drugs derived from this compound and used as tranquilizers in the treatment of psychiatric disorders, such as schizophrenia.

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phenothiazine

the first broad-spectrum veterinary anthelmintic and the market leader in all agricultural animals for many years. Now largely superseded by more efficient compounds. Used now only in horses. Not recommended for use in pregnant mares because of the fear of causing abortion. Its principal use is in mixtures with piperazine and in small daily doses to inhibit egg-laying by resident worms. It must be supported by regular dosing at full dose rates. The name is also used to denote a group of major tranquilizers resembling phenothiazine in molecular structure.