A client is taking oral contraceptives. The nurse instructs her to use another form of birth control when she takes which prescribed medications?
Standard Text: Select all that apply.
1. Ampicillin
2. Tetracycline
3. Warfarin
4. Insulin
5. Theophylline
Correct Answer: 1,2
Rationale 1: Ampicillin can reduce the effectiveness of oral contraceptives and increase the risk of pregnancy.
Rationale 2: Tetracycline can reduce the effectiveness of oral contraceptives and increase the risk of pregnancy.
Rationale 3: Warfarin does not reduce the effectiveness of oral contraceptives.
Rationale 4: Insulin does not reduce the effectiveness of oral contraceptives.
Rationale 5: Theophylline does not reduce the effectiveness of oral contraceptives.
Global Rationale: Ampicillin and tetracycline can reduce the effectiveness of oral contraceptives. Warfarin, insulin, and theophylline do not have this effect.
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