Can you do anything active if you have pericarditis?

Pericarditis: Technically speaking, yes. In other words, no physical activity will make it worse. On a practical level, however, the discomfort or pain associated with pericarditis may limit your ability to exert yourself.

Anti-inflammatories: Anti-inflammatory agents such as nsaids, steroids or Colchicine can help in the active state of pericarditis.