When a company adds heart attack drugs to a vaccine for children, it raises some pretty obvious safety questions and concerns.

CLAIM: Pfizer added tromethamine to its formulation for the COVID-19 vaccine for kids ages 5 to 11. Tromethamine’s side effects are severe and pose risks to human health.

AP’S ASSESSMENT: Missing context. While Pfizer’s COVID-19 vaccine for children under 12 contains tromethamine, the company is also adding the ingredient to its vaccines for adults and teens. Experts say Pfizer’s clinical trials show the new vaccine formula containing tromethamine is safe. Several other FDA-approved vaccines use tromethamine.

THE FACTS: The U.S. Food and Drug Administration on October 29 approved emergency use authorization of Pfizer’s vaccine for children aged 5 to 11. The agency also approved a new formula for Pfizer’s vaccines for both children and adults that includes tromethamine, an ingredient used to increase storage times in pharmaceutical products.

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