22 August 2014 : Case report
Seizures after Heart Transplantation – Two Cases of Non-Immunosuppressant Drug Interactions in Young PatientsTomasz UrbanowiczABCDEF, Magdalena PawłowskaBCF, Piotr BuczkowskiDEF, Bartłomiej PerekBF, Hanna Baszyńska-WachowiakEF, Ewa Straburzyńska-MigajEF, Marek JemielityAEF
Ann Transplant 2014; 19:417-420
BACKGROUND: Neurological complications occur in 30–80% of patients following heart transplantation, and seizures account for 2–20% of these sequelae. The main risk factors are toxicity due to immunosuppression, infections, and brain lesions. We present 2 cases of grand mal type attacks that occurred on the 7th and 15th postoperative days. The origin of the attacks was an unusual interaction between 2 non-immunosuppressive drugs (metoclopramide and theophylline).
CASE REPORT: We present 2 cases of seizure episodes during the early postoperative period in young heart transplant recipients (a 26-year-old female and a 33-year-old man). Grand mal type attacks occurred on the 7th and 15th postoperative day, respectively. Both patients were treated with standard triple immunosuppressive therapy including tacrolimus, mycophenolate mofetil, and steroids. Therapy with metoclopramide was started because the patients reported gastrointestinal disturbances. Theophylline was administered due to postoperative bradycardia. Serum theophylline levels were 33 and 34 mcg/ml, respectively. There were no neurological deficits noticed thereafter. The magnetic resonance imaging (MRI) was negative for stroke and central nervous system infection in both cases.
CONCLUSIONS: We conclude that theophylline overdose combined with metoclopramide may provoke new-onset seizures, especially in young patients following heart transplantation.
Keywords: Drug Interactions, Epilepsy, Heart Transplantation, Metoclopramide, Theophylline
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