What is nausea, and what are its main causes?
Nausea is an unpleasant sensation of epigastric discomfort accompanied by the urge to vomit, without the expulsion of stomach contents (for more on vomiting, see our page on vomiting). It results from the activation of the vomiting center in the medulla oblongata. Our line of digestive medications offers antiemetic solutions tailored to every situation.
- Pregnancy-related nausea: affects 70–80% of pregnant women in the first trimester—linked to β-hCG and progesterone—typically occurs in the morning but can happen at any time—see our pregnancy product line
- Motion sickness (kinetosis): conflict between visual and vestibular input—car, boat, plane—preventive treatment recommended
- Drug-induced nausea: chemotherapy (most severe nausea), opioids, antibiotics, oral contraceptives, NSAIDs, metformin—irritation of the gastric mucosa or central action
- Gastrointestinal nausea: gastritis, food poisoning, gastroenteritis, reflux, delayed gastric emptying
- Central and psychogenic nausea: acute stress, anxiety, migraine, head trauma, meningitis — central mechanism (brain, not digestive)
Natural Remedies for Nausea
- Ginger (Zingiber officinale): the best-documented natural antiemetic — gingerols and shogaols act on 5-HT3 (serotonin) receptors and the stomach — proven effective for nausea during pregnancy, post-surgery, and chemotherapy (mild to moderate) — 250–500 mg of extract, 2–4 times a day — or fresh ginger tea (1 cm of root steeped for 10 minutes)
- Acupressure on point P6 (Neiguan): on the inner side of the wrist, 3 finger-widths above the wrist crease — apply pressure for 3–5 minutes — acupressure wristbands available — documented effectiveness for morning sickness and motion sickness
- Peppermint: menthol—gastric antispasmodic and local anesthetic effects—infusion or inhalation of essential oil—rapid relief from mild nausea—caution: avoid if you have GERD (relaxed sphincter muscle)
- Lemon: Inhalation of lemon zest — effectiveness for morning sickness confirmed in several studies — simple and safe
- Diet: small, frequent meals — light foods (crackers, fruit compote, rice) — avoid fatty, spicy, and strongly scented foods — see our tips on our stomach upset page
Medication depending on the situation
- Motion sickness: dimenhydrinate (Dramamine) or meclizine—take 30–60 minutes before departure—frequently causes drowsiness—transdermal scopolamine (patch behind the ear) for long trips
- Severe morning sickness: vitamin B6 (pyridoxine) 10–25 mg × 3 times daily — doxylamine — if hyperemesis gravidarum (hospitalization): IV antiemetics, parenteral nutrition — medical consultation is essential
- Mild digestive nausea: domperidone (Motilium) — prokinetic — promotes gastric emptying — do not use for > 7 days — contraindicated in cases of cardiac arrhythmia
- Chemotherapy-induced nausea: ondansetron (Zofran, anti-5HT3) + corticosteroids — prescription by an oncologist — ginger as a supplement for mild delayed nausea
- Seek medical attention if: nausea lasts > 24 hours with inability to eat, signs of dehydration, fever > 38.5°C, blood in vomit, nausea following head trauma — see our page on vomiting
Chronic Nausea and Special Situations
- Chronic nausea (> 4 weeks): medical evaluation is essential—H. pylori, IBD, celiac disease, gastroparesis, hyperthyroidism, tumor—do not treat with antiemetics without a diagnosis
- Non-pregnancy-related morning nausea: nocturnal hypoglycemia (protein-rich snack at bedtime) — alcohol consumed the previous day — otherwise: thyroid workup, fasting blood glucose
- Nausea related to stress/anxiety: brain-gut axis — stress management techniques (cardiac coherence, abdominal breathing) — CBT if there is repeated psychogenic nausea
- Older adults: Nausea may mask a serious underlying cause (heart failure, heart attack, meningitis)—routine evaluation if nausea is unusual and persistent
- Postoperative nausea and vomiting (PONV): common (30–50% of patients)—risk factors: female, nonsmoker, history of PONV, postoperative opioids—ondansetron + prophylactic dexamethasone
