A 37-year-old woman who is 8 weeks pregnant presents to the nurse practitioner with a chief complaint of severe morning sickness. Which one of the following will the NP recommend?

Choice A reason: Ondansetron is a potent antiemetic that can be effective for nausea and vomiting, but it is typically not the first-line therapy in early pregnancy due to potential, albeit low, risks of fetal malformations. Its use is usually reserved for cases refractory to first-line interventions. Choice B reason: Metoclopramide can be used for nausea and vomiting in pregnancy, but it carries risks of extrapyramidal side effects and is generally not the first-line recommendation for mild to moderate morning sickness. Choice C reason: Promethazine is an antihistamine antiemetic that can be used safely in pregnancy but is often reserved for more severe cases or when first-line therapy fails. Sedation is a common side effect. Choice D reason: Doxylamine, an antihistamine, combined with vitamin B6 (pyridoxine) is considered the first-line treatment for nausea and vomiting in pregnancy. This combination has demonstrated efficacy and safety in early pregnancy, making it the preferred initial therapy for severe morning sickness.