A young woman comes into the clinic with a respiratory infection. Because she has a fever of 101.6 ...

A young woman comes into the clinic with a respiratory infection. Because she has a fever of 101.6 F, the physician starts her on ampicillin 250 mg PO q6h. The patient has a history of being on birth control pills.
 
  What should you teach the patient about oral contraceptives with the use of antibiotics? 1. Penicillin will increase the effects of the birth control pill.
  2. Use a backup method for birth control protection this month.
  3. You will have a regular menstrual period; continue to take your birth control pill.
  4. Birth control pills work with antibiotics if you take an antacid with them.