Agomelatine and Transient Elevation of Creatine Phosphokinase

Agomelatine is an antidepressant drug with moderate agonistic action at the melatonine receptor MT1 and weak effect at MT2. According to clinical studies, agomelatine ameliorates depressive symptoms and improves sleep quality. Side effects such as elevated liver enzymes are well-known. Therefore, routine laboratory monitoring of liver function is recommended periodically throughout treatment because of a rare risk of more serious liver reactions. 2 patients with creatine phosphokinase elevation during treatment with agomelatine are presented. We recommend a check of the creatine phosphokinase level during the initial treatment phase in patients receiving agomelatine for the first time.