Pediatric antiemetic dosing calculator
Start here to choose the right medication page for pediatric nausea or vomiting. Use the medication pages to calculate exact doses and review safety notes.
Safety note
Quick picks
Printable
Ondansetron seasonal dosing (1-page)
Screen-readable quick reference with a separate disclaimer/download flow for print copies.
Ondansetron
Acute vomiting
First-line for acute vomiting when the goal is to enable oral rehydration (ORT).
Dimenhydrinate
Motion sickness
Best fit for motion sickness and vestibular-triggered nausea.
Other related options
These are sometimes used in specific situations. They are not first-line choices for every vomiting scenario.
Diphenhydramine
Sedating antihistamine
Sometimes used for motion sickness when sedation is acceptable.
Cyproheptadine
Prophylaxis
Used in some plans for cyclic vomiting syndrome or migraine prophylaxis (not acute rescue).
Related tools
FAQs
Use the medication-specific pages linked above. They include pediatric guidance, safety notes, and the dose calculator when supported.
Many pediatric pathways use ondansetron to help children tolerate oral rehydration therapy (ORT). If vomiting persists, reassess hydration status and consider urgent evaluation based on your clinical setting and local protocols.
Motion sickness is often vestibular-triggered; dimenhydrinate is commonly used. Some families use diphenhydramine, but sedation can be significant—follow product guidance and clinician advice.
Seek urgent evaluation for severe dehydration, persistent lethargy, bilious (green) vomiting, severe abdominal pain, blood in vomit or stool, or concern for ingestion/obstruction. Follow your institution’s pathway and local emergency guidance.
Some medicines and combinations can affect heart rhythm in susceptible patients. Review comorbidities, interacting medications, and local guidance—use the medication pages for safety notes and interaction considerations.