Notify the physician that mrs. johanson is taking oral contraceptives.-the nurse should be aware that tetracyclines decrease the effectiveness of oral contraceptives. the physician should be notified. the physician should be notified. tetracycline decreases the effectiveness of oral contraceptives. there may be an equally effective antibiotic available that can be prescribed. note on the clients chart that the physician was notified. the nurse should be aware that tetracyclines decrease the effectiveness of oral contraceptives. the nurse should not tell the client to stop taking oral contraceptives unless the physician orders this. the nurse should be aware that tetracyclines decrease the effectiveness of oral contraceptives. if the physician chooses to keep the client on tetracycline, the client should be encouraged to use another form of birth control. the first intervention is to notify the physician.