The rules of parenteral drug administration are universal world wide. Administration conditions, standardization of technical facilities and quality of care create differences in details of administration. In addition, parenteral drug administration provides indispensable health benefits; it may rarely cause undesirable side effects. Although parenteral route of treatment is not first choice, it is a commonly used treatment modality in childhood. In this case report, we present a 10-year-old boy patient with the diagnosis of attention deficit-hyperactivity disorder, in whom foot drop developed after gluteal intramuscular analgesic injection, although injection was applied at correct localization, with appropriate technique, and with suitable injector and drug, in order to discuss the complications of intramuscular drug injection and reasons for these complications. In the past medical history of this 10-yearold boy admitted with the symptoms of loss of sensation, burning and pain in the foot and inability to move the foot, it was learned that he admitted to a hospital due to renal colic and received the treatment of intramuscular diclofenac sodium injection and that three days after this treatment, foot drop developed. After evaluation of the history, physical examination and laboratory findings of the patient, we thought that this important neurological sequel a might have developed due to inadequate stabilization of the patient during the injection and toxic effect of the drug on the nerve.

Keywords: enjeksiyon, düşük ayak, dikkat eksikliği-hiperaktivite bozukluğu, injection, foot drop, attention deficit-hyperactivity disorder