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Ginger for nausea and vomiting of pregnancy Adrienne J. Lindblad

ACPR PharmD 

Sudha Koppula

MD MCISc CCFP

Clinical question Can ginger treat nausea and vomiting of pregnancy?

  —Limitations include small numbers, short expo   sure (median 2 days), and wide CIs.

Bottom line

Context

In the first trimester ginger might improve nausea and vomiting by about 4 points on a 40-point scale or stop vomiting for 1 in 3 women at 6 days. The largest study suggests no increase in fetal malformations or stillbirths, but smaller studies suggest otherwise.

• Based on limited clinical evidence, ginger is contraindicated close to labour or in those with a history of miscarriage, vaginal bleeding, or clotting disorders, owing to risk of hemorrhage. • The total dose is usually approximately 1 g per day, divided to be given twice to 4 times a day.1

Evidence Systematic reviews of RCTs evaluated ginger.1-7 • A Cochrane review found statistically significant results1: -Mean score difference on a 40-point nausea and vomiting scale was 4.19 vs placebo at 1 week (1 RCT, 70 women). -Of those taking ginger, 33% were vomiting on day 6 vs 80% of those taking placebo (NNT = 3; 1 RCT, 22 women). -There were no differences in spontaneous abortion or cesarean section rates (1 RCT, 67 women), or congenital abnormalities (1 RCT, 120 women). -There was no difference compared with vitamin B6 (4 RCTs, 625 women), metoclopramide (1 RCT, 68 women), or doxylamine-pyridoxine (1 RCT, 63 women). -Limitations included short-term adverse effects being rarely reported, inconsistent outcome measurements, and underpowered studies.2 • Cohort safety studies were conducted mostly in women in the first or second trimester: -In 68 522 women (1020 used ginger), there was no increase in fetal malformations, stillbirth or neonatal death, or preterm birth.8   —Vaginal bleeding or spotting after 17 weeks signifi   cantly increased (7.8% vs 5.8%; P 

Ginger for nausea and vomiting of pregnancy.

Clinical questionCan ginger treat nausea and vomiting of pregnancy?Bottom lineIn the first trimester ginger might improve nausea and vomiting by about...
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