GUIDE
Hyperemesis gravidarum (HG) is severe, persistent nausea and vomiting during pregnancy that causes weight loss, dehydration, and an inability to keep food or fluids down.
HG is not just bad morning sickness. It is a debilitating medical condition that affects 0.5 to 2 percent of pregnancies and can require hospitalization, IV fluids, and multiple medications. It is one of the leading causes of hospitalization in early pregnancy.
Be prepared from day one
Hyperemesis gravidarum is not an exaggerated version of morning sickness. It is a distinct medical condition with different underlying mechanisms and significantly more severe symptoms. While morning sickness makes pregnancy uncomfortable, HG can make it dangerous.
HG affects 0.5 to 2 percent of pregnancies and is one of the most common reasons for hospitalization in the first half of pregnancy. It is believed to be related to rapidly rising hCG levels and heightened sensitivity to pregnancy hormones, though the exact cause is not fully understood. Genetics play a role — if your mother or sister had HG, your risk is higher.
The condition gained significant public awareness when Catherine, Princess of Wales, was hospitalized with hyperemesis gravidarum during her pregnancies. Her openness about the condition helped many people understand that severe pregnancy nausea is a real medical condition, not a character flaw or sign of weakness.
If you are experiencing these symptoms, you likely have hyperemesis gravidarum and need medical treatment — not just crackers and ginger.
HG treatment aims to control nausea and vomiting, prevent dehydration, provide adequate nutrition, and allow the pregnant person to function. Treatment is typically multimodal — combining dietary strategies, medications, and sometimes IV fluids or even total parenteral nutrition (TPN, nutrition delivered directly into the bloodstream through an IV).
The first step is usually a combination of vitamin B6 and doxylamine, which is the active ingredient in Diclegis. If this is not sufficient — and for true HG, it usually is not — stronger medications are added. Ondansetron (Zofran) is widely used and effective for many people. It is available as pills, dissolvable tablets, and injections.
IV fluids are often necessary when dehydration is significant. You may receive fluids in the emergency room, at an outpatient infusion center, or through a home IV service. Fluids typically include saline with added vitamins (especially thiamine/B1, which can become dangerously depleted in HG).
If you have tried standard pregnancy nausea remedies without improvement, the issue is likely beyond what those strategies can address. Speak with your provider about prescription options.
These medications are considered safe in pregnancy. Your provider will help you find the right combination. Many people need more than one medication to achieve adequate control.
HG is easier to manage when treated early. Many people suffer in silence because they believe severe nausea is a normal part of pregnancy. It is not. If you cannot keep food or fluids down, are losing weight, or cannot function, tell your provider immediately. You deserve treatment — not a pat on the head and advice to eat crackers.
Treatment for HG typically follows a stepwise approach. Start with vitamin B6 plus doxylamine. If that is not enough, your provider may add ondansetron, metoclopramide, or other medications. Some people need multiple medications simultaneously. Finding the right combination takes time and advocacy — do not give up after one medication does not work.
If you cannot drink water, try ice chips, popsicles, sour candies, or small sips of flat ginger ale or electrolyte drinks. Some people tolerate cold fluids better than warm. IV fluids at an infusion center or hospital can be lifesaving when oral hydration fails — there is no shame in needing them.
HG may force you to stop working, rely on others for childcare and household tasks, and spend days in bed. This is not laziness or weakness — it is a medical condition. Accept help from partners, family, and friends. Let go of expectations about what pregnancy should look like. Your only job right now is to get through this.
HG can cause depression, anxiety, isolation, trauma, and in severe cases, suicidal thoughts. The combination of relentless physical suffering and feeling dismissed or disbelieved is psychologically devastating. A therapist experienced in perinatal mental health can help. If you are having thoughts of harming yourself, contact the 988 Suicide and Crisis Lifeline (call or text 988) or tell your provider immediately.
HG is a medical condition that requires medical treatment. You do not need to suffer in silence.
Severe dehydration and starvation are dangerous for both you and your baby. Go to the ER for IV fluids and evaluation.
HG takes an enormous psychological toll. Many people with HG describe feeling isolated, misunderstood, and dismissed by providers who tell them to try ginger or eat crackers. The constant nausea, inability to eat, loss of independence, and disruption to work and family life can lead to depression, anxiety, and trauma.
Some people with severe HG consider terminating a wanted pregnancy because the suffering is unbearable. This is not uncommon, and it does not make you a bad person — it means you are in extreme distress and need better treatment and support.
If you are struggling, reach out to the Hyperemesis Education and Research (HER) Foundation at hyperemesis.org. They provide resources, support, and a community of people who understand what you are going through. For related coping strategies, see our guides on morning sickness, pregnancy nausea remedies, pregnancy mood swings, pregnancy-safe medications, and high-risk pregnancy.
This guide is for informational purposes only and is not a substitute for professional medical advice. Always consult your healthcare provider with any questions about your pregnancy.
