Hyperemesis Treatment on the NHS: Complete UK Guide
How the NHS Treats Hyperemesis Gravidarum
Hyperemesis gravidarum (HG) is a recognised medical condition on the NHS, not something you are expected to simply endure. Treatment is provided in stages, starting with your GP and midwife and, if needed, moving up to hospital care. The aim is to keep you hydrated, nourished, and as comfortable as possible while your pregnancy progresses.
Step 1: GP and Midwife Care
The first port of call is usually your GP or midwife. They will assess how often you are being sick, whether you are keeping any fluids down, and whether you have lost weight. If they diagnose HG or suspect it, they will usually:
- Prescribe anti-sickness medication (antiemetics) that is safe in pregnancy
- Offer advice on eating, drinking, and rest
- Signpost you to the Pregnancy Sickness Support charity
- Arrange a follow-up to check how you are responding
- Refer you to the hospital if you are dehydrated or losing weight quickly
Step 2: First-Line Medications
The NHS uses a stepped approach to medication, starting with the safest and most established options:
- Cyclizine - an antihistamine that reduces nausea and vomiting. Widely used in UK pregnancy and considered safe
- Promethazine - another antihistamine, often used at night because it causes drowsiness
- Prochlorperazine - sometimes used for nausea that is not responding to other options
These can be taken as tablets or, if you cannot swallow them, as suppositories or injections.
Step 3: Second-Line Medications
If first-line medications are not working, your GP or hospital doctor may add or switch to:
- Ondansetron - originally developed for chemotherapy-related nausea, now widely and safely used in UK pregnancy for HG
- Metoclopramide - helps the stomach empty more quickly and reduces nausea
- Domperidone - sometimes used alongside other antiemetics
These are often combined, and the doses are adjusted to your response. All of these medications have been used in many thousands of UK pregnancies and are considered safe when prescribed by a healthcare professional.
Step 4: Vitamin and Mineral Support
With prolonged vomiting, you may also be given:
- Vitamin B6 (pyridoxine) - can reduce nausea and is often used alongside anti-sickness medication
- Thiamine (vitamin B1) - important if you have been vomiting for more than a week, to prevent rare complications
- Folic acid - continued through the first trimester, sometimes given as a prescription-only higher dose
- A pregnancy multivitamin if you can tolerate it
Step 5: Hospital Care
If you become dehydrated or cannot keep any medication down, the NHS will admit you to hospital for:
- Intravenous fluids - rehydration through a drip
- Anti-sickness medication through a vein or as an injection
- Blood tests to check your salt levels and kidney function
- Urine tests to look for ketones
- A short stay on an antenatal ward
Most women stay between 12 and 48 hours, though some need longer or repeated visits.
Ongoing Support
HG often lasts for weeks or months, so care does not end after one appointment. Your GP and midwife should:
- Review your medication regularly and adjust doses
- Monitor your weight and hydration
- Offer mental health support if the HG is affecting your mood
- Plan for any future pregnancies, since HG often recurs
Advocating for Yourself
Most NHS teams are experienced with HG, but if you feel you are not being taken seriously, you can:
- Bring a partner or friend to appointments for support
- Keep a diary of how often you are sick
- Ask to speak to a different GP or a specialist midwife
- Contact the Pregnancy Sickness Support charity for advice and advocacy
- Request a referral to an early pregnancy unit or a specialist HG clinic if one is available in your area
A Final Word
Effective NHS treatment for HG exists at every stage. The most important thing is to ask for help early and to keep asking until you feel properly supported. You do not have to be dangerously dehydrated before your symptoms are taken seriously.