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HG Treatment Options in the UK: A Complete Guide

Getting treatment for hyperemesis gravidarum (HG) in the UK can feel like a battle. You may be told to "try ginger" or "eat small meals" when what you need is proper medical care. This guide explains the stepped-care treatment pathway for HG in the UK, your rights, and how to advocate for yourself.

Table of Contents

  1. The Stepped-Care Approach
  2. Step 1: Lifestyle and Over-the-Counter
  3. Step 2: First-Line Prescription Medication
  4. Step 3: Second-Line Medication
  5. Step 4: Hospital Treatment
  6. Your Rights as an HG Patient
  7. Getting the Treatment You Deserve
  8. FAQ

The Stepped-Care Approach

The UK uses a **stepped-care approach** to treating nausea and vomiting in pregnancy (NVP) and HG. This means starting with the least invasive treatment and escalating as needed. The guidance is based on recommendations from the Royal College of Obstetricians and Gynaecologists (RCOG) and the National Institute for Health and Care Excellence (NICE).

The Key Principle

The crucial principle is: don't delay escalation. If a treatment isn't working within 24-48 hours, move to the next step. Some women need to start at step 2 or 3 immediately. Don't suffer for weeks before seeking help.

Step 1: Lifestyle and Over-the-Counter

### Lifestyle Measures - **Small, frequent meals** - every 1-2 hours - **Dry, bland foods** - crackers, toast, plain rice - **Cold foods** - less smell than hot foods - **Ginger** - tea, biscuits, capsules (up to 1g per day) - **Acupressure wristbands** (Sea-Bands) - **Vitamin B6** - may help mild nausea (ask your GP about dose) - **Rest** - fatigue worsens nausea - **Avoid triggers** - smells, foods, movement

Over-the-Counter

  • Ginger supplements (up to 1g per day)
  • Acupressure bands

When to escalate: If these don't work within a few days, or if you're vomiting 3+ times daily, move to step 2.

Step 2: First-Line Prescription Medication

If lifestyle measures aren't enough, your GP can prescribe:

Antihistamine-Based Anti-Sickness Medication

  • Cyclizine (often combined with other drugs): One of the most commonly prescribed. Read our cyclizine guide.
  • Promethazine (Avomine, Phenergan): Another antihistamine option. Read our promethazine guide.
  • Prochlorperazine (Stemetil): Can be taken as tablets or dissolvable buccal tablets

How They Work

These medications block histamine receptors in the brain that trigger nausea and vomiting. They're considered safe in pregnancy and have been used for decades.

Typical Dosage

  • Cyclizine: 50mg up to three times daily
  • Promethazine: 10-25mg every 4-8 hours
  • Prochlorperazine: 5-10mg up to three times daily

Combination Therapy

Many women need two medications together. For example, cyclizine and prochlorperazine are commonly combined for better effect.

When to escalate: If first-line medication isn't working within 48-72 hours, or if you still can't keep food or water down, move to step 3.

Step 3: Second-Line Medication

If first-line drugs don't work, your GP or a specialist can prescribe:

Ondansetron (Zofran)

  • Originally developed for chemotherapy patients
  • A 5-HT3 receptor antagonist
  • Often very effective when other drugs haven't worked
  • Can be taken as tablets, dissolvable tablets, or IV
  • Read our full ondansetron guide

Metoclopramide (Maxolon)

  • A dopamine antagonist
  • Often combined with ondansetron or other drugs
  • Can help with gastric emptying (slowed digestion worsens HG)

Domperidone

  • Similar to metoclopramide
  • Sometimes used when metoclopramide causes side effects

Combination Approaches

Many women with HG need multiple medications at once. A common combination is:

  • Cyclizine + ondansetron
  • Promethazine + metoclopramide
  • Cyclizine + prochlorperazine + ondansetron

Your GP may refer you to a specialist (obstetrician or gastroenterologist) at this stage.

When to escalate: If you still can't keep food or water down, or if you're dehydrated, move to step 4.

Step 4: Hospital Treatment

If oral medication isn't working, you need hospital treatment:

IV Fluids

  • The most important treatment for dehydration
  • Typically 1-3 litres over 24-48 hours
  • Contains essential electrolytes (potassium, sodium)

IV Anti-Sickness Medication

  • Ondansetron given IV is often highly effective
  • Cyclizine can also be given IV
  • May be more effective than oral medication because it bypasses the digestive system

IV Vitamins

  • Thiamine (vitamin B1) - essential if you've been vomiting significantly
  • Folic acid - if you can't keep oral tablets down
  • Multivitamins in severe cases

Tube Feeding

In extreme cases:

  • Nasogastric tube - liquid nutrition through a tube to your stomach
  • PEG tube - through the abdominal wall (very rare)
  • Total parenteral nutrition (TPN) - IV nutrition (very rare)

Duration

Most hospital stays are 1-3 days. Some women need:

  • Regular day-case visits for IV fluids
  • Multiple admissions during pregnancy
  • Long-term medication management

Your Rights as an HG Patient

### NICE Guidelines NICE guidelines on antenatal care recognise that nausea and vomiting in pregnancy can be severe and require treatment. You have the right to: - **Be taken seriously** - HG is a real medical condition - **Receive appropriate treatment** - not just "eat ginger and rest" - **Be referred to a specialist** if first-line treatment doesn't work - **Access hospital treatment** when needed

Pregnancy Sickness Support

The UK charity Pregnancy Sickness Support (pregnancysicknesssupport.org.uk) provides:

  • A helpline for women with HG
  • Information about treatment
  • Advocacy support
  • A community of women who understand

Your Maternity Rights

  • Sick leave - you're entitled to sick leave for HG, just like any other medical condition
  • Fit notes - your GP can provide these
  • Protection from discrimination - it's illegal to discriminate against you for pregnancy-related illness
  • Statutory Sick Pay (SSP) - if you're too ill to work

Getting the Treatment You Deserve

### If Your GP Isn't Helping

Some GPs are less informed about HG than others. If yours isn't taking you seriously:

  1. Ask for a different GP at your practice
  2. Contact your midwife - she can advocate for you
  3. Call 111 for advice and urgent appointments
  4. Go to A&E if you're severely dehydrated
  5. Contact Pregnancy Sickness Support for advice

Keep a Symptom Diary

  • Track when you vomit
  • Note what you can and can't eat
  • Record your weight
  • Note when you take medication and its effect

This evidence can help your GP understand the severity of your condition.

Ask for Referral

If first-line medication isn't working, ask your GP to refer you to:

  • An obstetrician (pregnancy specialist)
  • An early pregnancy unit
  • A gastroenterologist (in complex cases)

Don't Suffer in Silence

HG is a serious condition. If you're vomiting multiple times daily, can't keep water down, or are losing weight, you need medical help. Don't wait for it to "get better on its own."

Frequently Asked Questions

### Is HG treatment on the NHS?

Yes. All HG treatments - GP appointments, medications, hospital admissions, IV fluids - are available on the NHS. You may need to pay your standard prescription charge for medications unless you're entitled to free prescriptions (all pregnant women are entitled to free prescriptions - apply for your maternity exemption certificate).

How do I get free prescriptions in pregnancy?

Ask your GP or midwife for form FW8 to apply for a maternity exemption certificate. This gives you free NHS prescriptions and dental treatment until your baby's first birthday. You can also apply online via the NHS website.

What if my GP won't prescribe medication?

If your GP is reluctant to prescribe anti-sickness medication, ask why. If you're not satisfied, see a different GP or contact your midwife. You have the right to appropriate treatment for HG.

Can I see a private specialist for HG?

Yes. Private obstetricians and gastroenterologists can help with HG if you're not getting the care you need on the NHS. However, NHS treatment for HG is usually appropriate once you find a GP who understands the condition.

How long will I need HG medication?

Most women need medication until symptoms ease - typically weeks 14-20. Some women need medication throughout pregnancy. Your medication will be reviewed regularly and reduced when appropriate.

Further reading:

This article is for informational purposes only and does not constitute medical advice. Always consult your GP or midwife with any concerns about your pregnancy.

Last reviewed: June 2026

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