Is Pepto-Bismol Safe for Teens With the Flu?

If your teenager has the flu and an upset stomach, you may wonder whether Pepto-Bismol is a safe choice. The short answer is: Pepto-Bismol is generally not recommended for children or teenagers who have, or are recovering from, the flu unless a doctor specifically advises it.

The concern is not that Pepto-Bismol usually causes problems in healthy adults. The concern is that it contains bismuth subsalicylate, a medicine related to aspirin. Salicylate-containing medicines have been associated with Reye’s syndrome, a rare but serious condition that can affect the brain and liver after certain viral illnesses, including influenza and chickenpox.

For flu-related nausea, heartburn, or indigestion, a simple, non-salicylate antacid may be a safer option for some teens. However, the right treatment depends on the symptoms, the teen’s age, medical history, and the exact product being considered.

Why Pepto-Bismol can be a concern during the flu

Pepto-Bismol contains bismuth subsalicylate. The “subsalicylate” part is important because it is chemically related to salicylates, including aspirin.

Health authorities and product labeling warn against giving aspirin or salicylate-containing medicines to children and teenagers with flu symptoms or chickenpox. This is because of the possible link with Reye’s syndrome. Reye’s syndrome is uncommon, but it can develop quickly and requires urgent medical care.

Symptoms may include:

• Repeated vomiting
• Unusual sleepiness or confusion
• Irritability or personality changes
• Trouble staying awake
• Seizures
• Loss of consciousness

These symptoms are not typical of an uncomplicated stomach upset. Speak to a doctor immediately or seek emergency care if a teen has these symptoms, difficulty breathing, severe dehydration, a seizure, or a significant change in alertness.

Because Pepto-Bismol contains a salicylate, it is best to avoid it for a teen with the flu unless a healthcare professional has recommended it. This applies even if the medicine is sold without a prescription.

Is Pepto-Bismol approved for teenagers?

Many Pepto-Bismol products are labeled for adults and children age 12 and older for temporary relief of diarrhea, heartburn, indigestion, and nausea. That age statement does not mean the product is appropriate in every situation.

The same labeling generally warns against use in children and teenagers who have or are recovering from flu symptoms or chickenpox. Always read the specific package label because formulations and age recommendations can vary.

Parents should also avoid combining Pepto-Bismol with other salicylate-containing products. A teen may unknowingly receive salicylates from certain pain relievers or combination cold medicines. When in doubt, ask a pharmacist or doctor to review every medicine the teen is taking.

Pepto-Bismol can also temporarily turn the tongue or stool black. This can be harmless, but black stools may sometimes signal bleeding, particularly if they are tar-like or accompanied by weakness, dizziness, vomiting blood, or stomach pain. A healthcare professional should assess those symptoms.

Why antacids may be safer for viral illness

Traditional antacids do not contain salicylates. They work by neutralizing stomach acid and may help with occasional heartburn, acid indigestion, or an acidic stomach feeling. Common ingredients include:

• Calcium carbonate
• Magnesium hydroxide
• Aluminum hydroxide

Because these ingredients are not aspirin-like salicylates, they do not carry the same Reye’s syndrome concern associated with Pepto-Bismol during influenza or chickenpox.

However, “safer” does not mean “right for every teen” or “a treatment for the flu.” Antacids only address certain stomach symptoms. They do not kill the influenza virus, shorten the illness, prevent complications, or replace fluids and rest.

Some antacids can cause side effects:

• Calcium-based products may cause constipation.
• Magnesium-based products may cause diarrhea.
• Aluminum-based products may cause constipation.
• Some products contain multiple active ingredients or added medicines.

Teens with kidney disease, a history of kidney problems, or a need to take several prescription medicines should not use an antacid without professional advice. Antacids can also interfere with the absorption of some medicines, so they may need to be taken at a different time.

Liquid and chewable products can have different dosing instructions. Use the dose listed for the teen’s age on the package, and do not give more often than directed.

What can help a teen with flu-related stomach symptoms?

Flu can cause fever, body aches, headache, cough, fatigue, and sometimes nausea, vomiting, or diarrhea. Supportive care is often the main treatment for mild illness.

Helpful steps may include:

• Offer frequent small sips of water, oral rehydration solution, or clear fluids.
• Use small, bland meals when the teen feels able to eat.
• Encourage rest and sleep.
• Avoid forcing food if nausea is present, but continue offering fluids.
• Use fever or pain medicine only as directed on the label or by a healthcare professional.
• Do not give aspirin to a child or teenager with flu symptoms.
• Ask a doctor promptly whether an antiviral medicine is appropriate, especially if symptoms began recently or the teen has a chronic health condition.

Acetaminophen may be appropriate for fever or discomfort when used correctly. Ibuprofen may be suitable for some teens, but it is not ideal for everyone, particularly those who are dehydrated, vomiting repeatedly, have kidney disease, or have been told to avoid anti-inflammatory medicines. Never combine products containing the same active ingredient, and check combination cold medicines carefully.

When should a doctor be contacted?

Contact a doctor if the teen has persistent vomiting, cannot keep fluids down, urinates much less than usual, has very dark urine, becomes unusually weak, or shows signs of dehydration such as a dry mouth, dizziness, or fainting.

Medical advice is also important if the teen has asthma, diabetes, a weakened immune system, kidney disease, heart disease, or another long-term condition. Teens with severe obesity or other risk factors for flu complications may also need early evaluation.

Consider a free, online symptom check, using the doctor-approved Ubie Symptom Checker to help organize symptoms and decide what questions to ask a healthcare professional. It is not a substitute for diagnosis or urgent care.

The bottom line

For a teenager with the flu, Pepto-Bismol is usually not the first choice because it contains bismuth subsalicylate, a salicylate linked to the rare but serious risk of Reye’s syndrome during certain viral illnesses. Do not use it for flu-related symptoms unless a doctor specifically says it is appropriate.

A non-salicylate antacid may be safer for occasional heartburn or acid indigestion, but it will not treat the flu and may still be unsuitable for some teens or interact with other medicines. Check the active ingredients, follow the dosing instructions, and ask a pharmacist or doctor when unsure.

Speak to a doctor about anything that could be life-threatening or serious, including breathing trouble, confusion, severe dehydration, seizures, persistent vomiting, or a teen who is difficult to wake.