Ibuprofen 600mg tid or aspirin 1gr tid will be given as first line therapy for at least 7-10 days provided that CRP is normalized within the same time interval, and subsequent tapering in the following 3-4 weeks. Steroids will be given at a dose of 0.2-0.5mg/kg of prednisolone or equivalent dose of another steroid until CRP normalization and symptoms resolution followed by tapering according to recommendations. Indications for steroids administration as a first line treatment included secondary cause of pericarditis and contraindications or poor response to NSAIDs treatment (persisting symptoms and/or CRP elevation beyond 10 days of treatment). Colchicine will be given in all cases at a dose of 0.5mg bid (unless contraindicated) and halved in patients aged >70 years old or body weight <70kg.Treatment failure with first line medication and/or switch to steroids for any reason was recorded.