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Benzonatate Side Effects

Medically reviewed by Drugs.com. Last updated on Mar 5, 2024.

Applies to benzonatate: oral capsule, oral capsule liquid filled.

Serious side effects of benzonatate

Along with its needed effects, benzonatate may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking benzonatate:

Rare

  • confusion
  • difficult breathing
  • difficulty with speaking
  • seeing things that are not there
  • shortness of breath
  • tightness in the chest
  • wheezing

Get emergency help immediately if any of the following symptoms of overdose occur while taking benzonatate:

Symptoms of overdose

Other side effects of benzonatate

Some side effects of benzonatate may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common or rare

For healthcare professionals

Applies to benzonatate: oral capsule.

General

The most serious side effects reported were bronchospasm, laryngospasm, and cardiovascular collapse.[Ref]

Hypersensitivity

Nervous system

Respiratory

Gastrointestinal

Dermatologic

Ocular

Other

References

1. (2001) "Product Information. Tessalon (benzonatate)." Forest Pharmaceuticals

Frequently asked questions

Further information

Benzonatate side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.