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Benzonatate

Brand names: Tessalon Perles

Benzonatate is a prescription cough capsule that numbs stretch sensors in the lungs to calm a cough.

Brand namesTessalon Perles
Type of medicineCough medicine
Prescription?Prescription
ImportantThis page is general information, not a prescription. Don't start, stop, or change a medicine without talking to your provider or pharmacist.

Overview

It doesn't treat the cause of the cough.

What it's used for

  • Cough from colds, bronchitis, and other causes

How to take it

  • Swallow capsules whole. Never chew, crush, or suck on them; they can numb the mouth and throat and cause choking.
  • Keep away from children. Swallowing even one or two can be deadly for a child under 10.

Your dose depends on your health and other medicines. Always follow your prescription label, and ask your pharmacist if anything is unclear.

Side effects

Common side effects

  • Sleepiness
  • Dizziness
  • Headache
  • Upset stomach
Call 911A child swallowed it, or choking, seizures, or a fast heartbeat after taking it. Call 911.
Call 911Swelling of the face, lips, or throat, hives, or trouble breathing
Call your provider todayConfusion or seeing things

Warnings

  • Not for children under 10.
  • See a provider for cough lasting more than 3 weeks, coughing blood, or trouble breathing.

Other medicines, foods, and alcohol

  • Alcohol and sedating medicines may add to drowsiness.

Tell your provider and pharmacist about every medicine, vitamin, and supplement you take.

Pregnancy and breastfeeding

Talk with your provider.

Missed doses, overdose, and storage

If you miss a dose

This medicine is often taken only when needed. If you take it on a schedule, take a missed dose when you remember, unless it's almost time for the next one. Don't double up.

If someone takes too much

Call Poison Control at 1-800-222-1222 or get help online at poison.org. Call 911 if the person collapses, has a seizure, has trouble breathing, or can't be woken.

Storing it

Store at room temperature, away from heat and moisture (not in the bathroom), and out of reach of children and pets.

Conditions it's used for

Sources

Last updated 2026-11-13.