title: Atypical myopathy: pentazocine induced.
abstract: Pentazocine is a mixed agonist/antagonist opioid analgesic agent that can induce an atypical myopathy following intramuscular injections. This iatrogenic myopathy is rare, typified by fibrosis, and should be differentiated from other myopathies. We describe a case of pentazocine-induced myopathy that caused wasting of musculature in the gluteal region bilaterally and stiffness and woody induration in the legs of 42-year-old man. Though rare, clinicians should be alerted to this potential side effect and avoid repeated administration of intramuscular pentazocine.
authors.affiliation: Drs. Kolikonda, Cherlopalle, Enja, and Lippmann are with the University of Louisville School of Medicine, Department of Psychiatry, Louisville, Kentucky.
authors.forename: Murali K
authors.initials: MK
authors.lastname: Kolikonda
authors.affiliation: Drs. Kolikonda, Cherlopalle, Enja, and Lippmann are with the University of Louisville School of Medicine, Department of Psychiatry, Louisville, Kentucky.
authors.forename: Suneela
authors.initials: S
authors.lastname: Cherlopalle
authors.affiliation: Drs. Kolikonda, Cherlopalle, Enja, and Lippmann are with the University of Louisville School of Medicine, Department of Psychiatry, Louisville, Kentucky.
authors.forename: Manasa
authors.initials: M
authors.lastname: Enja
authors.affiliation: Drs. Kolikonda, Cherlopalle, Enja, and Lippmann are with the University of Louisville School of Medicine, Department of Psychiatry, Louisville, Kentucky.
authors.forename: Steven
authors.initials: S
authors.lastname: Lippmann
keywords: analgesia; drug-induced myopathy; intramuscular pentazocine; myopathy; pentazocine; pentazocine-induced muscular adversity; pentazocine-induced muscular side-effect