The preferred drug to be used in combination with zidovudine for perinatal transmission prevention is:
1. ritonavir.
2. lamivudine.
3. tenofovir.
4. didanosine.
Correct Answer: 2
Rationale 1: Ritonavir is not the preferred drug to be used in combination with zidovudine for perinatal transmission prevention.
Rationale 2: The preferred drug to be used in combination with zidovudine for perinatal transmission prevention is lamivudine.
Rationale 3: Tenofovir is not the preferred drug to be used in combination with zidovudine for perinatal transmission prevention.
Rationale 4: Didanosine is not the preferred drug to be used in combination with zidovudine for perinatal transmission prevention.
Global Rationale: Recommended protocols for the pregnant woman include two NRTIs (zidovudine and lamivudine) with either an NNRTI (nevirapine) or a PI (lopinavir boosted with ritonavir). The specific regimen is adjusted based on resistance testing.
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