Effectiveness of Acupuncture and Doxylamine/Pyridoxine for Moderate to Severe Nausea and Vomiting in Pregnancy

Subjects will be randomized into one of the four treatment arms: A) active acupuncture (30 min /every day) + Diclectin (combination of doxylamine succinate (10 mg) and pyridoxine hydrochloride (10 mg) , 2-4 tablets/day); B) sham acupuncture (30 min /every day) + Diclectin (2-4 tablets/day); C) active acupuncture (30 min / every day) + Diclectin placebo (2-4 tablets/day); D) sham acupuncture (30 min /every day) + Diclectin placebo (2-4 tablets/day). Participants will receive active acupuncture or sham acupuncture treatment daily, 14 times in total, and receive Diclectin or placebo treatment every day (2 tablets at bedtime for the first two days, if the symptoms are unrelieved, add one tablet in the morning, if the symptoms are still unrelieved, add another one tablet at three o 'clock in the afternoon) for 2 consecutive weeks, 28-56 tablets in total. Daily measurement PUQE score, Visual analog scale (VAS), Adverse events and concomitant medications. Weekly visits will include global assessment of well being, adverse events and concomitant medications. The visit after treatment will assess NVP quality of life (NVPQoL), SAS, SDS and so on. Participants will be followed up 30 days after treatment. Primary outcomes is difference of the mean change in PUQE score from baseline to the last visit. Secondary outcomes were some core outcome set for hyperemesis gravidarum, including weight difference, quality of life (change in Global assessment of well-being, NVPQOL, VAS, SDS and SAS), pregnancy complication, treatment compliance, neonatal outcomes; area under the curve of PUQE score, effect of intervention on PUQE score reduction over treatment period and adverse events.