Several medicines help with nausea, ranging from over-the-counter options you can pick up today to prescription drugs for more severe or persistent cases. The right choice depends on what’s causing your nausea, how long it’s lasted, and whether you’re pregnant, recovering from surgery, or dealing with motion sickness.
Over-the-Counter Options for General Nausea
Bismuth subsalicylate (the active ingredient in Pepto-Bismol and Kaopectate) is one of the most widely available treatments for nausea tied to an upset stomach, heartburn, or indigestion. It works by coating the stomach lining and reducing inflammation in the digestive tract. The standard adult dose is two tablets or two tablespoonfuls every 30 minutes to an hour as needed, with a maximum of 16 tablets or 16 tablespoonfuls of regular-strength liquid in 24 hours.
Phosphorated carbohydrate solutions (sold as Emetrol) take a different approach. These are sugar-based syrups that calm stomach muscle contractions. They’re available without a prescription and can be used in children as young as two, though you should follow the product label closely for pediatric dosing.
Antihistamines for Motion Sickness
If your nausea is triggered by movement, whether from a car, boat, or plane, antihistamine-based medications are the go-to choice. The two main over-the-counter options are dimenhydrinate (original Dramamine) and meclizine (sold as Dramamine Less Drowsy or Bonine).
Both work by blocking signals in the inner ear that trigger nausea, but they differ in how drowsy they make you. Meclizine is marketed as “less drowsy,” which is a bit misleading. User-reported data actually shows meclizine causes more drowsiness (about 21% of users) compared to dimenhydrinate (about 13%). The “less drowsy” label likely reflects meclizine’s longer duration of action, meaning you take fewer doses and experience a steadier, less intense wave of sedation rather than a sharp peak. Meclizine has a half-life of about six hours, so a single dose lasts longer and you won’t need to redose as often. Either way, plan on feeling sleepy with both options.
For surgical nausea prevention, a scopolamine patch is a prescription alternative. You apply it behind the ear the evening before surgery, and it delivers a steady dose over three days. It’s also used for severe motion sickness when oral medications aren’t practical.
Prescription Medicines for Severe Nausea
When over-the-counter options aren’t enough, doctors have several stronger tools. Ondansetron (Zofran) is one of the most commonly prescribed anti-nausea medications. It works by blocking serotonin receptors in the gut and brain that trigger the vomiting reflex. Originally developed for patients undergoing chemotherapy, it’s now widely prescribed for nausea from stomach bugs, post-surgical recovery, and other causes. It dissolves on the tongue, which is helpful when swallowing a pill feels impossible.
Promethazine is another prescription option, available as both a tablet and a rectal suppository. The suppository form is particularly useful when you’re actively vomiting and can’t keep a pill down. The typical adult dose for nausea is 25 mg initially, then 12.5 to 25 mg every four to six hours as needed. Promethazine causes significant drowsiness, which can actually be a benefit if nausea is keeping you from sleeping.
For nausea caused by gastroparesis (a condition where the stomach empties too slowly), metoclopramide may be prescribed. This drug speeds up stomach emptying, which addresses the root cause rather than just masking symptoms. However, it carries an FDA black box warning: long-term use can cause a movement disorder called tardive dyskinesia, involving involuntary movements of the face, tongue, or limbs. This condition is sometimes irreversible. Because of this risk, treatment is generally limited to 12 weeks, though about 20% of patients end up taking it longer than that.
Safe Options During Pregnancy
Morning sickness affects the majority of pregnant people, and the treatment approach is deliberately conservative. The American College of Obstetricians and Gynecologists recommends starting with vitamin B6, which is available over the counter and has been shown to be safe for the fetus. If B6 alone doesn’t provide enough relief, doxylamine (an antihistamine found in some over-the-counter sleep aids) can be added. Both drugs, taken alone or together, have no known harmful effects on the developing baby.
A prescription combination of vitamin B6 and doxylamine is also available for convenience. For more severe pregnancy nausea that doesn’t respond to this first-line approach, doctors may prescribe ondansetron, though this is typically reserved for cases where other options have failed.
Ginger and Other Non-Drug Approaches
Ginger has genuine anti-nausea properties and isn’t just a folk remedy. Clinical trials have tested standardized ginger capsules containing active compounds called gingerols and shogaols, including in chemotherapy patients experiencing significant nausea. The key is getting a meaningful dose. Ginger tea, ginger chews, or ginger capsules from a health food store can all help with mild nausea, but the concentration varies wildly between products. Look for supplements that list the gingerol content if you want something more reliable.
Peppermint is another option with some evidence behind it, often used as a tea or inhaled as an essential oil. It works primarily on mild, stomach-related nausea rather than nausea from inner ear issues or medications.
What to Eat When You’re Nauseous
What you put in your stomach matters as much as what medicine you take. A bland diet is the standard recommendation: soft foods that are low in fiber, not spicy, and easy to digest. Good choices include bananas, applesauce, plain crackers, white rice, broth-based soups, toast made with white bread, gelatin, and popsicles. Eggs, tofu, and lean baked poultry are fine once you’re ready for protein. Weak tea is generally well tolerated.
A few habits help as much as the food itself. Eat small amounts more frequently rather than full meals. Chew slowly and thoroughly. Sip fluids rather than gulping them. Avoid fatty, fried, or heavily spiced foods until your nausea has fully resolved. Cold or room-temperature foods tend to be easier to tolerate than hot dishes, partly because they produce less smell.
Choosing the Right Treatment
Matching the medicine to the cause makes a real difference. Motion sickness responds best to antihistamines like meclizine or dimenhydrinate, ideally taken 30 to 60 minutes before travel. Stomach bug or food-related nausea usually improves with bismuth subsalicylate, bland foods, and time. Post-surgical nausea is typically managed with ondansetron or a scopolamine patch applied before the procedure. Pregnancy nausea starts with vitamin B6. Chronic nausea from gastroparesis or other ongoing conditions requires a doctor’s evaluation to identify the underlying cause and choose a treatment that’s safe for longer use.
If you’re vomiting so frequently that you can’t keep fluids down for more than 24 hours, or if nausea appears alongside severe abdominal pain, high fever, or signs of dehydration (dark urine, dizziness when standing, dry mouth), those are signs that over-the-counter treatments aren’t sufficient and you need medical attention.