Muscle Injury After Intramuscular Administration of Diclofenac: A Case Report Supported by Magnetic Resonance Imaging.
Intramuscular injection of diclofenac is still frequently practiced, although there is ample evidence that the risk of local tissue intolerability is highly underestimated. The aim of this study was to evaluate local toxicity in a patient using magnetic resonance imaging. A patient who gave written informed consent received a medically indicated intramuscular administration of diclofenac 75 mg/2 mL. Simultaneously with magnetic resonance imaging of the depot, a clinical-chemical evaluation and quantification of diclofenac in plasma was performed. A manifold enhancement of the T2-weighted magnetic resonance signal was observed in a muscle area of approximately 60 mL volume, with maximum signal intensity 30 min after injection, the time of maximum diclofenac plasma exposure. Plasma creatine kinase activity was elevated approximately sixfold within 8 h and normalized within 1 week, whereas the magnetic resonance enhancement disappeared within 5 weeks. Interestingly, the patient did not complain about any clinical symptoms at the injection site. Asymptomatic tissue injury after intramuscular injection of diclofenac, caused by intramuscular dosing, can be reliably evaluated by magnetic resonance imaging and should be applied early during the development of parenteral dosage forms. Clinical Trials Registration Number: BB130/16 (Ethics Committee of the University Medicine Greifswald).
Department of Biopharmaceutics and Pharmaceutical Technology, Center of Drug Absorption and Transport (C_DAT), Ernst Moritz Arndt University Greifswald, Felix-Hausdorff-Straße 3, 17487, Greifswald, Germany. mareike.probst@uni-greifswald.de.
Mareike
http://orcid.org/0000-0001-5350-928X
M
Probst
Institute of Diagnostic Radiology and Neuroradiology, University Medicine Greifswald, Ferdinand-Sauerbruch-Straße, 17475, Greifswald, Germany.|Institute of Radiology, University Medicine, Carl Gustav Carus University Dresden, Fetscherstraße 74, 01307, Dresden, Germany.
Jens-Peter
JP
Kühn
Department of Clinical Pharmacology, Center of Drug Absorption and Transport (C_DAT), University Medicine Greifswald, Felix-Hausdorff-Straße 3, 17487, Greifswald, Germany.
Christiane
C
Modeß
Department of Clinical Pharmacology, Center of Drug Absorption and Transport (C_DAT), University Medicine Greifswald, Felix-Hausdorff-Straße 3, 17487, Greifswald, Germany.
Eberhard
E
Scheuch
Department of Biopharmaceutics and Pharmaceutical Technology, Center of Drug Absorption and Transport (C_DAT), Ernst Moritz Arndt University Greifswald, Felix-Hausdorff-Straße 3, 17487, Greifswald, Germany.
Anne
A
Seidlitz
Institute of Diagnostic Radiology and Neuroradiology, University Medicine Greifswald, Ferdinand-Sauerbruch-Straße, 17475, Greifswald, Germany.
Norbert
N
Hosten
Department of Clinical Pharmacology, Center of Drug Absorption and Transport (C_DAT), University Medicine Greifswald, Felix-Hausdorff-Straße 3, 17487, Greifswald, Germany.
Werner
W
Siegmund
Department of Biopharmaceutics and Pharmaceutical Technology, Center of Drug Absorption and Transport (C_DAT), Ernst Moritz Arndt University Greifswald, Felix-Hausdorff-Straße 3, 17487, Greifswald, Germany.
Werner
W
Weitschies