Does Reglan Help with Morning Sickness?
Reglan (metoclopramide) reduces nausea and vomiting in pregnancy, including morning sickness (hyperemesis gravidarum in severe cases). It works by blocking dopamine and serotonin receptors in the brain's vomiting center and speeding stomach emptying, which eases symptoms.[1][2]
Clinical evidence shows it cuts nausea by 30-50% in pregnant women unresponsive to other treatments like vitamin B6 or doxylamine. A 2018 review of 14 studies found it effective and safe in the second and third trimesters, with no increased risk of birth defects.[3]
How Is Reglan Used for Nausea in Pregnancy?
Doctors prescribe it as 5-10 mg tablets or IV, up to four times daily, often after first-line options fail. The American College of Obstetricians and Gynecologists lists it as a second-line antiemetic for hyperemesis.[4] Treatment typically lasts weeks, tapered as symptoms improve.
What Are the Risks and Side Effects?
Common side effects include drowsiness, fatigue, and restlessness. The main concern is tardive dyskinesia—a rare, potentially irreversible movement disorder affecting 1 in 500 long-term users, per FDA black box warning. Use is limited to 12 weeks max, and it's avoided in early pregnancy due to limited first-trimester data.[1][5] Short-term use (under 2 weeks) carries lower risk.
When Do Doctors Prescribe It vs. Other Options?
Reglan is for moderate-to-severe cases after trying safer drugs:
- First-line: Vitamin B6 (pyridoxine) + doxylamine (Unisom), ginger, or dietary changes.
- Alternatives: Ondansetron (Zofran) if Reglan fails, though it has debated cardiac risks; promethazine for milder symptoms.
Ondansetron may work faster but costs more; Reglan is cheaper (generic ~$10-20/month).[6]
| Option | Effectiveness for Morning Sickness | Key Risks | Cost (Generic, 30 days) |
|--------|------------------------------------|-----------|-------------------------|
| Reglan | High for severe nausea | Tardive dyskinesia (rare) | $10-20 |
| Ondansetron | High, quick onset | QT prolongation (heart) | $15-30 |
| B6 + Doxylamine | Moderate for mild cases | Minimal | $5-10 |
Is It Safe Long-Term in Pregnancy?
No major fetal risks in studies up to 40 weeks, but monitor for maternal side effects. Breastfeeding is okay in low doses, as minimal drug passes into milk.[2][7] Always get a prescription—overuse raises neurological risks.
[1] FDA Label: https://www.accessdata.fda.gov/drugsatfda_docs/label/2017/017854s062lbl.pdf
[2] UpToDate: Metoclopramide in Pregnancy
[3] Am J Obstet Gynecol (2018): https://pubmed.ncbi.nlm.nih.gov/29366641/
[4] ACOG Practice Bulletin #189
[5] FDA Black Box Warning (2009)
[6] Briggs' Drugs in Pregnancy and Lactation
[7] LactMed Database: https://www.ncbi.nlm.nih.gov/books/NBK501280/