Hyperemesis Gravidarum Supportive Care Protocol
Primary Stack
Core supplements with strongest evidenceFirst-line treatment for pregnancy nausea; safe and effective; often combined with doxylamine
Reduces nausea; safe in pregnancy; evidence supports effectiveness for pregnancy-related nausea
Supporting Stack
Additional supplements for enhanced resultsCritical supplementation to prevent Wernicke encephalopathy from prolonged vomiting and malnutrition
Replaces electrolytes lost through vomiting; prevents dehydration and imbalances
Supporting Studies (1)
May become depleted with prolonged vomiting and malabsorption
Supporting Studies (1)
Essential for fetal development; must be maintained despite inability to eat
Supporting Studies (1)
Comprehensive nutrition support; may need to switch to smaller or chewable forms
Supporting Studies (1)
Iron often worsens nausea; temporarily using iron-free prenatal may improve tolerance
Supporting Studies (1)
Often depleted from vomiting; supports muscle function and may help with nausea
Supporting Studies (1)
How This Protocol Works
Simple Explanation
Hyperemesis gravidarum (HG) is severe nausea and vomiting during pregnancy that goes beyond typical "morning sickness." It causes dehydration, weight loss (>5% of pre-pregnancy weight), electrolyte imbalances, and can require hospitalization. HG affects about 0.5-2% of pregnancies and usually begins around weeks 4-6, peaks at 9-13 weeks, and improves by week 20 for most women (though some have symptoms throughout pregnancy).
CRITICAL: Hyperemesis gravidarum requires medical care. If you cannot keep down fluids, are losing weight, urinating very little, or feeling faint, seek medical attention. Treatment may include:
THIS IS NOT "JUST MORNING SICKNESS." HG is a serious condition that can affect you and your baby. Don't suffer in silence.
* Vitamin B6 (Pyridoxine) is the first-line supplement for pregnancy nausea. It's safe and effective. Often combined with doxylamine (antihistamine) as prescription Diclegis/Bonjesta.
* Ginger has been studied in multiple trials for pregnancy nausea and shown to be safe and effective. Can be taken as capsules, tea, or candies.
* Thiamine (B1) supplementation is CRITICAL in HG. Prolonged vomiting can cause thiamine deficiency, leading to Wernicke encephalopathy (a neurological emergency). All HG patients should receive thiamine.
* Electrolyte replacement addresses losses from vomiting.
* Prenatal vitamins: If standard prenatals worsen nausea, switch to iron-free, gummy, or smaller formulations. Don't stop taking prenatals - work with your provider to find a tolerable form.
Expected timeline: Many women feel improvement by weeks 16-20. Supplements help manage symptoms but don't "cure" HG. The condition runs its course with proper supportive care.
Clinical Perspective
Hyperemesis Gravidarum: persistent nausea/vomiting in pregnancy causing >5% weight loss, dehydration, ketonuria, electrolyte disturbances. Differentiate from nausea/vomiting of pregnancy (NVP - affects 70-80%, mild). Onset: typically 4-6 weeks, peaks 9-13 weeks, resolves by 20 weeks in most. Risk factors: HG in prior pregnancy, molar pregnancy, multiple gestation, female fetus, family history, H. pylori.
CRITICAL: Medical management essential. Assess dehydration (vitals, mucous membranes, skin turgor), weight loss, ketones (urine/blood), electrolytes, thyroid function. Treatment: 1) IV fluids (NS or LR with potassium/dextrose as needed); 2) Thiamine 100mg IV/IM before dextrose (PREVENT WERNICKE); 3) Antiemetics (doxylamine+B6 first-line; ondansetron, metoclopramide, promethazine, prochlorperazine as needed); 4) Enteral or parenteral nutrition if unable to tolerate oral; 5) Consider corticosteroids (methylprednisolone) for refractory cases. Supplements are SUPPORTIVE alongside medical treatment.
* Vitamin B6 (A-grade): First-line; 10-25mg TID. Systematic review: (PMID: 12067688). Cochrane: (PMID: 27398892). Safe in pregnancy. With doxylamine = Diclegis.
* Ginger (A-grade): Safe and effective. Meta-analysis: (PMID: 24642205). Systematic review: (PMID: 26593562). 250mg QID or 1g total daily.
* Thiamine (A-grade): CRITICAL - prevent Wernicke. Guidelines: (PMID: 27398892). 100mg daily oral; IV before dextrose if hospitalized. Wernicke: ataxia, confusion, ophthalmoplegia - medical emergency.
* Electrolytes (A-grade): Replace losses. Review: (PMID: 16625635). ORS if tolerating; IV if not. Monitor K, Na, Cl.
* Vitamin K (C-grade): May deplete with prolonged HG. Review: (PMID: 17509427). 5-10mg daily if prolonged.
* Folate (A-grade): Essential for neural tube development. (PMID: 28403564). 400-800mcg daily; IV if needed.
* Prenatal Vitamins (A-grade): Switch formulation if causing nausea. Review: (PMID: 27398892). Gummies, chewables, or iron-free may be better tolerated.
* Iron-Free Prenatal (B-grade): Iron worsens nausea. Review: (PMID: 19846246). Temporary iron-free until symptoms improve.
* Magnesium (C-grade): Lost through vomiting. Review: (PMID: 28445426). 200-400mg daily.
Assessment targets: Weight (compared to pre-pregnancy), ketones, electrolytes, hydration status, PUQE score (severity), quality of life, fetal wellbeing.
Protocol notes: Thiamine deficiency: can develop within 2-3 weeks of poor intake; ALWAYS supplement in HG before giving dextrose (glucose without B1 precipitates Wernicke). Ondansetron: effective but some concern about cleft palate risk in first trimester (small absolute risk) - discuss with patient. Refractory HG: consider methylprednisolone (limited to first trimester if possible due to cleft palate concern; some centers use after first trimester). Enteral/parenteral nutrition: if unable to maintain hydration/nutrition orally for prolonged period; PICC line for TPN. H. pylori: test and treat if positive. Small frequent meals: better tolerated than large meals. Dietary triggers: avoid individual triggers (often fatty, spicy, strong-smelling foods). Psychological support: HG is extremely distressing; anxiety/depression common; support and validation important. Subsequent pregnancies: 15-20% recurrence risk; early prophylactic treatment may help. Fetal outcomes: usually good with treatment; severe untreated HG associated with SGA, preterm birth. Medication safety in pregnancy: B6, doxylamine, ondansetron, metoclopramide, promethazine all considered acceptable - risk of untreated HG usually greater than medication risk.