Cannabis consumption has increased over the past decade, together with its application in the medical field. 1 Therefore, close monitoring of the potential harm to public health caused by its use is required. Many of the related health implications of cannabis include cardiovascular diseases. 2 In young adults with a history of cannabis use, higher frequency of admission for acute myocardial infarction, arrhythmia and stroke were described in a recent study. 3 Although rare, cases of marijuana-induced toxic myocarditis have been reported in literature. 4–11 This study examines a case of a young male patient with acute myocarditis following marijuana use.