Ciplactin 4mg tablets contain Cyproheptadine which is a part of a class of antihistamine drugs. Cyproheptadine acts to block the action of histamine. Which is responsible for allergic reactions. It is effective in the treatment of various types of allergic reactions like runny nose, sneezing, itching, and watery eyes. Apart from this it also works to treat allergic skin issues like angioedema and urticaria.