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A phenothiazine drug, C23H26N5O7S, given in its hydrochloride form for sedation.

[propio(nyl), radical derived from propionic acid + (pro)m(eth)azine, an antihistamine and antidepressant (pro(pyl) + meth(yl) + (phenothi)azine).]
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In 7 of the falls precipitated by drugs, the judgment was that there had been an overdose (various combinations of benzodiazepines, dextropropoxyphene, propiomazine, levomepromazine [not available in the US], and carbamazepine) in 1 resident who had problems with addiction to drugs and alcohol.