Benzonatate Side Effects

Not all side effects for benzonatate may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

For the Consumer

Applies to benzonatate: oral capsule, oral capsule liquid filled

In addition to its needed effects, some unwanted effects may be caused by benzonatate. In the event that any of these side effects do occur, they may require medical attention.

You should check with your doctor immediately if any of these side effects occur when taking benzonatate:

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 of the side effects that can occur with benzonatate may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

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.

Hypersensitivity

Frequency not reported: Bronchospasm, laryngospasm, cardiovascular collapse, hypersensitivity

Nervous system

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

Respiratory

Frequency not reported: Nasal congestion, numbness of the chest

Gastrointestinal

Frequency not reported: Constipation, nausea, GI upset

Dermatologic

Frequency not reported: Pruritus, skin eruptions

Ocular

Frequency not reported: Sensation of burning in the eyes

Other

Frequency not reported: Vague "chilly" sensation

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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