A rare complication of Neisseria meningitidis is pericarditis. Here a 74-year-old male with Neisseria meningitidis serogroup W(P1.5-2) presented with myopericarditis. The patient developed cardiac tamponade and a pericardiocentesis was subsequently performed. The patient also developed a duodenal perforation, possibly secondary to the stress from being critically ill. The patient fully recovered.