title: An unusual effect of interferential therapy.
abstract: In this report, a patient with severe shoulder pain was treated with interferential currents, a commonly used modality in physiotherapy for the management of pain. He reported loss of concentration, drowsiness, decreased alertness and gait disturbance, along with analgaesia, for 4-5 h after each treatment. He was regularly taking tramadol HCl for pain relief. Endogenous opioids produced in response to interferential therapy may be excessive or may interact with the tramadol HCl and potentiate its effect. There is no published report of interferential-induced symptoms, as described above, in the authors' knowledge. The clinician using interferential currents should be aware of this possible effect.
authors.affiliation: Department of Physiotherapy, St. Patrick's Hospital, Carrick on Shannnon, Ireland. Karamatjee@gmail.com
authors.forename: Keramat Ullah
authors.initials: KU
authors.lastname: Keramat
authors.forename: Aisling
authors.initials: A
authors.lastname: Gaughran
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D000701:Analgesics, Opioid / Q000627:therapeutic use; D001288:Attention; D004244:Dizziness / Q000209:etiology*; D020234:Gait Ataxia / Q000209:etiology*; D006801:Humans; D008297:Male; D026741:Physical Therapy Modalities / Q000009:adverse effects*; D016059:Range of Motion, Articular; D000070599:Shoulder Injuries; D020069:Shoulder Pain / Q000188:drug therapy / Q000628:therapy*; D014147:Tramadol / Q000627:therapeutic use
chemical_list: D000701:Analgesics, Opioid; D014147:Tramadol