The nurse is teaching a patient about safe use of adrenergic drugs. Which statement should be included in the teaching?
-"You can take cold medications while on this drug, but talk to your doctor about other medications."
-"You shouldn't take cold remedies or appetite suppressants while on this drug, but you can take any other medication safely."
-"Talk to your doctor before taking any other medications."
-"Tell your health care provider if you are allergic to penicillin."