Which instruction should the nurse give a 21-year-old female client being treated with ampicillin…

Which instruction should the nurse give a 21-year-old female
client being treated with ampicillin (Principen)?

1. Stop taking oral contraceptives because serious adverse
effects could occur. 2. Use oral contraceptives as prescribed because
antibiotics do not react with birth control pills. 3. The antibiotic may
decrease the effectiveness of oral contraceptives. 4. The antibiotic when taken
with oral contraceptives causes toxicity.