Tessalon, approved by the FDA to treat symptomatic relief of cough in patients older than 10, may attract younger children because of the drug's candy-like appearance – a round, liquid-filled gelatin capsule. The safety and effectiveness of benzonatate in children younger than 10 years has not been established.
"Benzonatate should be kept in a child-resistant container and stored out of reach of children," said Carol Holquist, R.Ph., director of FDA's Division of Medication Error Prevention and Analysis. "The FDA encourages health care professionals to talk with their patients and those caring for children about the risk of accidental ingestion or overdose."
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Common adverse events reported in the overdose cases included cardiac arrest, coma, and convulsion. Signs and symptoms of overdose can occur within 15-20 minutes of ingestion. Some of the deaths reported in children have been within hours of the accidental ingestion.
The FDA is also adding a new Warning and Precaution section to the benzonatate drug label to warn health care professionals about accidental ingestion resulting in overdose and death in children younger than 10.