Tricotropism by Pentazocine

Abstract
To the Editor.— Pentazocine is a potent analgesic considered as a synthetic morphinelike narcotic agonist, and its abuse has led to the development of severe complications of the vascular, respiratory, and central nervous systems, which complications are more common among drug addicts using arterial or intravenous lines for injection of insoluble oral preparations.1 By far the commonest side effects of pentazocine abuse are cutaneous.2 The subcutaneous or intramuscular self-administration of parenteral preparations may lead to the development of sclerodermalike inflammatory lesions, subcutaneous abscesses, cellulitis, ulceration, muscle atrophy, and granulomas.3 An isolated case of toxic epidermal necrolysis in a patient with severe renal failure has also been reported.4 Report of a Case.— Because of severe pain, analgesic treatment with pentazocine, aspirin, and codeine was initiated in a 65-year-old woman with a resected adenocarcinoma of the rectum and metastatic lesions in the sacral region. On the third day

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