Tessalon Side Effects

Generic Name: benzonatate

Note: This page contains side effects data for the generic drug benzonatate. It is possible that some of the dosage forms included below may not apply to the brand name Tessalon.

It is possible that some side effects of Tessalon may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

For the Consumer

Applies to benzonatate: oral capsule, oral capsule liquid filled

As well as its needed effects, benzonatate (the active ingredient contained in Tessalon) may cause unwanted side effects that require medical attention.

If any of the following side effects occur while taking benzonatate, check with your doctor immediately:

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

If any of the following symptoms of overdose occur while taking benzonatate, get emergency help immediately:

Symptoms of overdose
  • Change in consciousness
  • convulsions (seizures)
  • loss of consciousness
  • no blood pressure or pulse
  • restlessness
  • shakiness in the legs, arms, hands, or feet
  • stopping of the heart
  • trembling or shaking of the hands or feet
  • unconsciousness

Some benzonatate side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

Less common or rare
  • Burning sensation in the eyes
  • constipation
  • dizziness (mild)
  • drowsiness (mild)
  • headache
  • itching
  • nausea or vomiting
  • skin rash
  • stuffy nose

For Healthcare Professionals

Applies to benzonatate: oral capsule

General

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

Hypersensitivity

Frequency not reported: Bronchospasm, laryngospasm, cardiovascular collapse, hypersensitivity[Ref]

Nervous system

Frequency not reported: Sedation, headache, dizziness, mental confusion, visual hallucinations.[Ref]

Respiratory

Frequency not reported: Nasal congestion, numbness of the chest[Ref]

Gastrointestinal

Frequency not reported: Constipation, nausea, GI upset[Ref]

Dermatologic

Frequency not reported: Pruritus, skin eruptions[Ref]

Ocular

Frequency not reported: Sensation of burning in the eyes[Ref]

Other

Frequency not reported: Vague "chilly" sensation[Ref]

References

1. "Product Information. Tessalon (benzonatate)." Forest Pharmaceuticals, St. Louis, MO.

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