skip to main content

Nausea and vomiting of pregnancy — USMLE Step 3 MCQ

Instant feedback + full explanation. One question, done properly.

EasyOB/GYNNausea and vomiting of pregnancyUSMLE Step 3

A 31-year-old woman at 9 weeks' gestation has nausea and vomiting. She can keep down liquids but vomits after most meals. Weight is unchanged, urine ketones are negative, sodium is 138 mEq/L, potassium is 3.7 mEq/L, and creatinine is 0.7 mg/dL. She asks for treatment. Which of the following is the most appropriate next step in management?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: B — Doxylamine-pyridoxine

Nausea and vomiting of pregnancy without dehydration, electrolyte derangement, or weight loss is treated initially with dietary measures and doxylamine-pyridoxine. Hyperemesis with complications would require IV fluids and further therapy.

Reference: ACOG Nausea and Vomiting of Pregnancy guidance