Key takeaways
Benzonatate is usually taken for about a week, and a persistent or worsening cough should be evaluated by a healthcare provider.
The usual benzonatate dose is 100–200 mg up to three times daily, with a maximum of 600 mg per day.
Swallow benzonatate capsules whole, as chewing, biting, or sucking them can numb the mouth and throat and cause drooling, speech difficulty, and choking.
Benzonatate is generally prescribed short-term, often for a few days to about a week, depending on the cause of the cough and your healthcare provider’s instructions. Also sold under the brand name Tessalon Perles, benzonatate is a non-opioid prescription cough suppressant for adults and children over 10. It works by numbing parts of the airways and lungs involved in triggering the cough reflex.
How long is benzonatate usually prescribed?
There is no single recommended treatment duration for everyone taking benzonatate. It is generally used for a few days to about a week, depending on the cause of the cough, how symptoms respond, and the prescribing healthcare provider’s instructions.
“A few days, maybe a week, depending on the situation and the prescriber’s instructions,” says Bidwell Cranage, APRN, FNP-C, board-certified family nurse practitioner and the founder of Bidwell Health. “The suggested time period varies according to the reason for the cough and the instructions of the prescribing clinician,” says Adam Y. Goldman, MD, medical director of Metropolitan Vein & Aesthetic Center in New York City.
Benzonatate relieves coughing but does not treat its underlying cause, so it should not be continued longer than recommended, Dr. Goldman says.
“If the cough is not improving after about a week, or it improves and then gets worse again, the patient should be reassessed as this could be something more than a viral upper respiratory tract infection,” advises Cranage.
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What is the dosage for benzonatate?
The usual benzonatate dosage for adults and children over 10 is 100–200 mg up to three times a day as needed for cough. The maximum single dose is 200 mg, and the maximum daily dose is 600 mg divided into three doses. Benzonatate comes in 100 mg and 200 mg liquid-filled capsules.
A total of 400 mg in one day may fall within the recommended daily dosage for benzonatate when taken in divided doses as prescribed. However, 400 mg should not be taken as a single dose. If you’ve taken more benzonatate than directed, contact your healthcare provider or Poison Control at 1-800-222-1222 for guidance.
Benzonatate dosing schedule (ages 10 and older) |
|
|---|---|
| Typical dose | 100–200 mg as needed |
| How often?/Frequency | Up to three times daily |
| Maximum daily dose | 600 mg in divided doses |
| Maximum single dose | 200 mg |
| Typical duration | Up to 1 week |
How long does benzonatate take to work and last?
It takes 15 to 20 minutes for benzonatate to work, and its effects last between three and eight hours. Because the effects wear off within several hours, benzonatate may be taken up to three times a day as prescribed to provide continued cough relief.
When should you stop taking benzonatate?
You should stop taking benzonatate when your cough improves or when your healthcare provider tells you to stop. If your cough does not improve after about a week, gets worse, or returns after improving, contact your healthcare provider rather than continuing benzonatate on your own.
“When a cough persists, gets worse, or presents with worrisome signs or symptoms like shortness of breath, chest pain, high fever, or blood, the patient should be medically evaluated, and shouldn’t continue taking cough suppressants,” warns Dr. Goldman.
You should also contact a healthcare provider if you develop concerning side effects or signs of an allergic reaction. Common side effects of benzonatate include drowsiness, nausea, tiredness, headache, and stomach pain. Dr. Goldman advises, “Patients should seek medical attention from their HCP if their symptoms get worse, if they have severe dizziness, confusion, unusual sleepiness, problems with swallowing, breathing difficulties, or if they have any symptoms that they think might be signs of an allergic reaction.”
Who should not take benzonatate?
Benzonatate should not be given to children younger than 10. It should also be kept out of children’s reach because accidental ingestion can cause serious toxicity. “Ingestion, especially if by a child, can be associated with severe toxicity and should be treated immediately with medical or poison control advice,” Dr. Goldman says.
Patients with known allergies to benzonatate or related medications such as procaine or tetracaine should not take it. “Before treatment, patients should also inform their health care professional about any relevant allergies, medical conditions, and any other medicines that they are taking,” he adds.
There are limited safety data on benzonatate use during pregnancy and breastfeeding. People who are pregnant or breastfeeding should ask their healthcare provider whether benzonatate is appropriate for them or whether another treatment may be recommended.
Why must benzonatate capsules be swallowed whole?
Benzonatate capsules must be swallowed whole and should never be chewed, bitten, sucked, or dissolved. Breaking a capsule can release the medication into the mouth and throat, causing numbness that may lead to choking or difficulty swallowing. In rare cases, severe reactions affecting breathing can also occur.
Benzonatate suppresses coughing by numbing receptors in the respiratory tract. If a capsule breaks in your mouth, Cranage suggests a few steps: “Spit out what is left. Do not eat or drink until normal feeling returns.” Watch for trouble swallowing, drooling, wheezing, throat tightness, lightheadedness, or difficulty breathing, which he says “means an immediate trip to the emergency room (ER).”
Benzonatate vs. over-the-counter cough medicine
Benzonatate is a prescription cough suppressant that works by numbing receptors in the respiratory tract that trigger coughing. Dextromethorphan, a common OTC cough suppressant, works in the nervous system to reduce the cough reflex. OTC medicines may be appropriate for some short-term coughs, while a healthcare provider may prescribe benzonatate when prescription cough relief is needed. Guaifenesin is different from both because it is an expectorant that thins and loosens mucus, making it easier to cough up.
Patients should not combine benzonatate with OTC cough or cold medicines without checking with a healthcare professional. “Products that are listed on the OTC market may contain a variety of active ingredients such as cough suppressants, expectorants, antihistamines, or a combination of multiple. Checking the active ingredient(s) can prevent duplicate therapy or possibly excessive side effects,” says Dr. Goldman. Cranage adds, “The question is not just ‘can these go together?’ It is what else is in the bottle.”
If benzonatate is not appropriate or does not provide enough relief, a healthcare provider can recommend other benzonatate alternatives based on the cause of the cough.
RELATED: How much is benzonatate without insurance?
Expert takeaway
Dr. Leslie Greenberg, Associate Professor at the University of Nevada, Reno School of Medicine and member of the SingleCare Medical Review Board, prescribes benzonatate when patients have a tickle on the back of the throat that makes them cough. This is the type of cough that is especially quieted by benzonatate.
Frequently asked questions
What happens if you accidentally chew or bite a benzonatate capsule?
If you accidentally chew or bite a benzonatate capsule, it can numb your mouth and throat and increase the risk of difficulty swallowing or choking. Do not eat or drink until the numbness resolves, and seek medical attention if symptoms worsen or you develop trouble swallowing or breathing.
What if you accidentally took 400 mg (an overdose) of benzonatate?
If you accidentally take 400 mg of benzonatate at one time, contact your healthcare provider or Poison Control at 1-800-222-1222 for guidance. A 400 mg single dose exceeds the recommended maximum single dose of 200 mg and can cause serious toxicity.
Can you take benzonatate with over-the-counter cough medicine?
Check with your healthcare provider or pharmacist before combining benzonatate with OTC cough or cold medicine. Some products, such as Mucinex DM, contain multiple active ingredients, so checking the label can help prevent duplicate treatment or unnecessary side effects.
Is benzonatate a controlled substance or narcotic?
Benzonatate is not a controlled substance, narcotic, or opioid. It works differently from opioid cough medicines such as codeine, although a prescription is still required.
- Benzonatate 100 mg capsule, liquid filled, benzonatate 200 mg capsule, liquid filled, DailyMed (2026)
- Benzonatate (Rx), Medscape
- Benzonatate exposure trends and adverse events, Pediatrics (2022)
- Dextromethorphan, StatPearls [Internet] (2025)
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