For most adults and teens 12 and older, the usual maximum is up to 16 regular-strength Pepto-Bismol chewable tablets in 24 hours , which equals 8 “doses” of 2 tablets each. This should not be continued for more than 2 days unless a doctor says otherwise.

Typical adult dosing (chewables)

  • Standard dose: 2 chewable tablets as one dose for adults and children 12+.
  • How often: Every 30–60 minutes as needed for diarrhea or stomach upset.
  • Absolute daily max: 8 doses in 24 hours → 2 tablets × 8 = 16 chewable tablets.
  • Duration: Do not use at the maximum dose for more than 2 days; see a doctor if symptoms persist.

Important safety points

  • Children under 12: Regular Pepto-Bismol and many chewables contain bismuth subsalicylate (a salicylate, like aspirin), and product labels say to ask a doctor for kids under 12.
  • Special kids’ versions: “Pepto Kids” chewables use a different ingredient and have much lower maximums (for example, up to 3–6 chewable tabs per day depending on weight/age).
  • Do not use in children or teens recovering from viral illnesses like flu or chickenpox because of Reye’s syndrome risk from salicylates.
  • Avoid or talk to a doctor first if you:
    • Take blood thinners or other salicylates (like aspirin).
* Have bleeding disorders, stomach ulcers, severe kidney problems, or are pregnant.

When to get urgent help

Stop taking Pepto and get medical help or call poison control/ER immediately if:

  • You or a child took more than the daily maximum or you are unsure how many were taken.
  • You notice confusion, ringing in the ears, trouble breathing, severe vomiting, blood in stool or vomit, or unusual bruising/bleeding.

Quick rule of thumb

  • Adult/12+: Up to 16 regular chewables in 24 hours , short term only.
  • Under 12: Use only a kids’ product and follow the package or a pediatrician’s instructions.

If you tell your exact age, weight, and whether it is the kids’ or regular Pepto chewables, a more tailored safe range can be outlined. Information gathered from public forums or data available on the internet and portrayed here.