Before you take afatinib, tell your healthcare provider about all of your medical conditions, including if you:have kidney or liver problems have lung or breathing problems other than lung cancer
have a history of an ulcer, a tear (perforation) in your stomach or intestine, or diverticular disease (inflammation) in parts of your large intestine. See “What are the side effects of afatinib?” below
have a history of severe dry eye or any other eye problems. Tell your healthcare provider if you wear contact lenses.have heart problems