Understanding Benzonatate Side Effects, Risks and more

Last Edited: July 20, 2026

Benzonatate, commonly known under the brand name Tessalon Perles, is a popular cough medicine used to relieve coughs. Available as an oral capsule, specifically a liquid-filled capsule, it is often prescribed to manage persistent coughs. However, like any medication, Benzonatate side effects can vary, so it’s essential to be aware of these potential unwanted effects, especially if they are unusual or severe. Understanding how Benzonatate interacts with certain medicines, recognizing overdose symptoms, and knowing when to call your doctor for medical advice are crucial steps in ensuring safe usage. This blog will explore the various side effects of Benzonatate, what to do if you miss a dose, and how to handle an overdose. If any severe side effects occur, seek medical attention and contact your doctor immediately.

Alcohol consumption and other medications can affect benzonatate, indicating potential interactions that may increase risks of sedation and dizziness. It is important to consult a healthcare professional about drug interactions that can worsen side effects and lead to serious health risks.

What is Benzonatate (Tessalon Perles) Cough Suppressant?

Benzonatate is a non-narcotic oral antitussive (cough suppressant) used to relieve coughing as part of a group of medications called antitussives. To explain how benzonatate work, it acts directly on the lungs and breathing passages and inhibits the cough reflex at the level of the medulla. Benzonatate is a non narcotic cough suppressant and is often prescribed for coughs caused by the common cold, bronchitis, pneumonia, or other respiratory conditions.

Key points about Benzonatate:

Usage: It is typically used to suppress coughing. It should be taken exactly as prescribed by a healthcare provider.
Dosage: The dosage is generally based on the individual’s medical condition and response to treatment. It usually comes in 100 mg or 200 mg capsules.
Administration: Benzonatate is supplied as liquid filled capsules, which should be swallowed intact and not chewed or dissolved. Capsules should be swallowed intact to avoid numbing of the mouth and throat, which can lead to choking or other adverse effects.
Side Effects: Common side effects may include drowsiness, dizziness, headache, nausea, or constipation. Serious side effects can include allergic reactions, mental/mood changes, and confusion.
Precautions: It should not be used in children under 10 years old. Caution is advised for people with certain medical conditions, such as a history of severe allergic reactions. Consult a health care professional for more information about side effects.

Drug therapy with health system pharmacists may include dispensing Benzonatate, which provides temporary local anesthesia for cough relief.

Benzonatate Types and Dosages

Benzonatate is available in different forms and dosages, primarily as capsules and softgels. The specific types and dosages include:

Benzonatate Capsules (Perles):

100 mg Capsules: These are small, pearl-like capsules, often referred to as “perles.”
200 mg Capsules: These are larger capsules.

Benzonatate Softgels:

100 mg Softgels: Similar in dosage to the capsules, these are available in a softgel form.
150 mg Softgels: This is another dosage form available as a softgel, providing a middle ground between the 100 mg and 200 mg dosages.
200 mg Softgels: These are larger softgels, providing the highest dosage form available.

Dosage Instructions:

Adults and Children over 10 Years: The typical dose is 100 mg to 200 mg, taken three times a day as needed for cough. The maximum recommended dose is 600 mg per day.
Children under 10 Years: Benzonatate is not recommended for children under 10 years due to the risk of serious side effects and potential choking hazard.
Missed Dose: If you miss a dose, skip the missed dose and take the next scheduled dose. Do not take a double or extra dose to make up for the missed dose as this can lead to dangerous side effects. Resume your regular dosing schedule.

Administration:

The capsules or softgels should be swallowed whole with water.
Do not chew, crush, or dissolve the capsules or softgels as this can cause numbing of the mouth and throat, which can lead to choking or severe allergic reactions.

Note: Always follow the prescribed dosage and instructions provided by your healthcare provider. Do not exceed the recommended dosage, and consult your healthcare provider if you have any questions or concerns regarding the medication.

Chronic cough can be treated with benzonatate, but follow dosage forms and the prescription label carefully.

What is Benzonatate Used For: Relieve Cough

Benzonatate is primarily used as a cough suppressant for the relief of:

Cough associated with the common cold: Helps alleviate persistent dry cough.
Bronchitis: Reduces coughing fits that can accompany this respiratory condition.
Pneumonia: Provides relief from the cough that often accompanies pneumonia.
Other respiratory conditions: Helps manage coughs related to various other respiratory illnesses.

Key Points:

Non-productive coughs: Especially effective for dry, irritating coughs.
Short-term relief: Used to reduce cough frequency and intensity, providing comfort and improving sleep quality.

Benzonatate is not an antibiotic or antiviral and does not treat the underlying cause of the cough. It is used symptomatically to make patients more comfortable while their body fights off the infection or irritation causing the cough. Always use Benzonatate as prescribed by a healthcare provider.

How Long Does Benzonatate Stay in Your System?

Benzonatate has a half-life of approximately 3.8 hours. This means that it takes about 3.8 hours for the concentration of the drug in the bloodstream to reduce by half.

Key Points:

Onset of Action: Benzonatate begins to work within 15 to 20 minutes after ingestion.
Duration of Effect: The effects can last for up to 8 hours.
Elimination: Given the half-life of 3.8 hours, Benzonatate is typically eliminated from the system within about 19 hours (approximately five half-lives).

Considerations:

Individual factors such as metabolism, age, liver function, and kidney function can influence how long Benzonatate stays in the system.
Despite the relatively short half-life, effects are sustained for several hours due to the drug’s action on the cough reflex.

Benzonatate Onset and Duration

Onset: Benzonatate starts working within 15 to 20 minutes after ingestion.
Duration: The effects last for up to 8 hours, providing prolonged relief from coughing.

This rapid onset and extended duration make Benzonatate effective for managing persistent coughs throughout the day and night.

Benzonatate Storage and Disposal

Storage:
Keep at room temperature (20-25°C or 68-77°F).
Store in a tightly closed container, away from light and moisture. Use a closed child proof container to prevent accidental ingestion by children.
Keep out of reach of children and pets.
Disposal:
Do not flush down the toilet or pour into drains.
Use a drug take-back program if available.
If no take-back program is available, mix the medication with an unappealing substance (like coffee grounds or cat litter), place in a sealed plastic bag, and dispose of in the household trash.

Always follow local regulations and guidelines for medication disposal.

Effects of Benzonatate on the Body

Effects of Benzonatate on the Body:

Cough Suppression: Numbs stretch receptors in the lungs and airways, reducing the cough reflex. The medication affects the body by calming the cough reflex, which helps relieve symptoms.
Onset: Begins to work within 15-20 minutes.
Duration: Provides relief for up to 8 hours.

Side Effects:

Common: Drowsiness, dizziness, headache, nausea, constipation. The medication affects some patients by causing drowsiness or dizziness, so it is important to monitor for these side effects.
Serious: Allergic reactions, mental/mood changes, confusion. Benzonatate interactions with certain cold medications may possibly relate to mental confusion.

Always follow prescribed guidelines and consult with a healthcare provider for any concerns.

Benzonatate Side Effects, Risks, and Unusual or Allergic Reactions

Common Side Effects:

Drowsiness
Dizziness
Headache
Nausea
Constipation
Nasal congestion

Less Common but Serious Side Effects:

Allergic reactions (e.g., rash, itching, swelling, severe dizziness, trouble breathing)
Mental/mood changes (e.g., confusion, hallucinations)
Numbness in the mouth, throat, or chest (if the capsule is chewed or dissolved). Improper use, such as chewing or sucking the capsule, can cause a choking feeling and may require urgent medical attention. Some people may feel numbness or experience numbness or tingling in the mouth, tongue, throat, or face if the medication is released in the mouth.
Difficult breathing difficulty
Unusual or allergic reaction

Adverse effects may impact the respiratory passages, causing irritation or difficulty breathing. Benzonatate oral capsule should be reviewed in your medical history due to potential allergic reactions or drug interactions.

Rare but Severe Risks:

Severe allergic reactions: Anaphylaxis can occur, requiring immediate medical attention.
Accidental overdose: Can cause restlessness, tremors, seizures, and cardiac arrest. This is especially risky in children under 10 years.
Choking hazard: If the capsule is chewed, it can cause numbing of the mouth and throat, leading to a choking risk.
If an overdose occurs, contact a poison control center at 800-222-1222 or seek emergency medical assistance immediately.

Seek immediate medical attention if you experience any of the following symptoms: severe dizziness, trouble breathing, swelling of the face, lips, tongue, or throat, confusion, hallucinations, or persistent numbness or tingling.

Precautions:

Children: Not recommended for children under 10 years due to the risk of severe side effects.
Swallowing: Always swallow capsules whole to avoid numbing of the mouth and throat.
Medical Conditions: Inform your healthcare provider if you have a history of allergic reactions or other medical conditions.

Always follow the prescribed dosage and consult your healthcare provider for any concerns regarding side effects or risks associated with Benzonatate.

Benzonatate, a prescription drug for symptomatic relief, can affect individuals if taken improperly, with too much benzonatate causing severe drowsiness, benzonatate overdose, or severe hypersensitivity reactions; always follow the prescription label and seek emergency medical attention for signs and symptoms of accidental ingestion.

Is Benzonatate Addictive?

Benzonatate is non-narcotic and not addictive. It does not work on the central nervous system like opioid-based cough suppressants, so it does not have the potential for abuse or dependence.

Can You Experience a Benzonatate Overdose?

Yes, an overdose on Benzonatate is possible and can be serious. Symptoms of overdose may include:

Restlessness
Tremors
Seizures
Cardiac arrest
Severe dizziness or fainting

Symptoms of overdose can occur rapidly after ingestion, so it is important to act quickly.

Key Points:

Children: Particularly at risk; even a small amount can be dangerous.
Immediate Medical Attention: Required if overdose is suspected. If an overdose occur, the person should be taken to the hospital immediately.

Always follow the prescribed dosage and keep the medication out of reach of children.

Prevalence of Benzonatate Side Effects

The prevalence of side effects for Benzonatate can vary, but generally, they are considered uncommon. Here’s a brief overview:

Common Side Effects (less frequent):

Drowsiness: Occurs in a small percentage of users.
Dizziness: Experienced by some individuals but not widespread.
Headache: Reported by a minority of patients.
Nausea: May affect a few users.
Constipation: Less commonly reported.

Serious Side Effects (rare):

Allergic Reactions: Such as rash, itching, swelling, severe dizziness, and trouble breathing. These are rare but require immediate medical attention.
Mental/Mood Changes: Confusion and hallucinations are very rare.
Numbness in Mouth/Throat: Occurs if the capsule is chewed, posing a choking hazard.
Rare Confusion: Although uncommon, confusion may occur and requires medical attention.

Overdose Risks:

Rare but serious, especially in children, with symptoms like restlessness, tremors, seizures, and cardiac arrest.

Key Points:

Side effects are generally rare and usually mild.
Serious side effects and overdose risks, although rare, necessitate caution and adherence to prescribed dosages.

Consult with a healthcare provider for personalized information and guidance regarding Benzonatate use.

What are the most common side effects of Benzonatate?

Drowsiness, dizziness, headache, nausea, and constipation.

What should I do if I experience severe side effects?

Seek immediate medical attention if you experience symptoms of a severe allergic reaction or other serious side effects.

Can Benzonatate affect my ability to drive?

Yes, because it can cause drowsiness and dizziness, it may impair your ability to drive or operate heavy machinery.

Can children take Benzonatate?

Benzonatate is not recommended for children under 10 years due to the risk of serious side effects.

What should I do if I accidentally chew a Benzonatate capsule?

If you chew or dissolve a Benzonatate capsule, it can numb your mouth and throat, leading to a choking hazard. Seek medical advice immediately if this occurs.

How Does Benzonatate Affect Your Mood?

Rare Side Effects: May cause confusion or hallucinations in rare cases.
Monitor: Watch for unusual mood changes.
Consult: Seek medical advice if significant mood changes occur.

Mood changes are uncommon but possible. Always report any concerning symptoms to your healthcare provider.

Does Benzonatate Make You Dizzy?

Yes, dizziness is a known side effect of Benzonatate.

Key Points:

Common Side Effect: Dizziness can occur in some users.
Monitor: Be aware of how you feel, especially when starting the medication.
Safety: Avoid driving or operating heavy machinery if you experience dizziness.

If dizziness persists or is severe, consult your healthcare provider.

Can Benzonatate Affect Your Pregnancy?

The effects of Benzonatate on pregnancy are not well-studied, and it is classified as a Category C drug by the FDA. This means that there are no well-controlled studies in pregnant women, and Benzonatate should only be used during pregnancy if clearly needed and prescribed by a healthcare provider.

Key Points:

Limited Data: There is a lack of extensive research on the safety of Benzonatate in pregnant women.
Category C: Potential risks should be weighed against the benefits.
Consult Healthcare Provider: Always consult your healthcare provider before using Benzonatate if you are pregnant or planning to become pregnant.

Your healthcare provider can help determine whether the benefits of taking Benzonatate outweigh the potential risks to your pregnancy.

Alcohol Use and Benzonatate

Combining alcohol with Benzonatate is not recommended due to potential additive effects.

Key Points:

Increased Drowsiness: Both alcohol and Benzonatate can cause drowsiness. Using them together can enhance this effect, leading to excessive sleepiness or sedation.
Increased Dizziness: The combination can also increase the likelihood of dizziness, impairing coordination and reaction time.
Safety Concerns: Avoid activities that require alertness, such as driving or operating heavy machinery, if consuming alcohol while taking Benzonatate.

Recommendation:

Avoid Alcohol: It is best to avoid alcohol while taking Benzonatate to prevent these potential side effects and ensure safety.

Benzonatate Drug Interactions with Other Medications

Benzonatate is generally considered to have a low potential for drug interactions, but there are some considerations to keep in mind.

Key Interactions:

CNS Depressants:

Examples: Sedatives, tranquilizers, and alcohol.
Effect: Enhanced sedative effects, increased risk of drowsiness, dizziness, and impaired coordination.

Other Cough Suppressants:

Examples: Codeine, dextromethorphan.
Effect: Potential for additive effects leading to excessive suppression of the cough reflex.

Medications that cause drowsiness:

Examples: Antihistamines (e.g., diphenhydramine), muscle relaxants, certain antidepressants, antipsychotics.
Effect: Increased drowsiness and sedation.

General Recommendations:

Consult Healthcare Provider: Always inform your healthcare provider of all the medications you are taking, including over-the-counter drugs and supplements, to avoid potential interactions. Be sure to mention any herbal products or natural supplements, as these can also interact with prescription medications.
Monitor Side Effects: Be cautious of increased drowsiness or dizziness if taking other medications that have sedative effects.

Benzonatate can interact with related compounds and other drugs, potentially causing adverse reactions. If a child accidentally ingests benzonatate capsules, it can lead to severe toxicity beyond treating cough symptoms.

Is Benzonatate Right for You?

Effective for Cough Relief: Especially for dry, non-productive coughs.
Non-Narcotic: No risk of addiction.
Consider Side Effects: Possible drowsiness, dizziness, allergic reactions.
Consult Healthcare Provider: Essential if pregnant, breastfeeding, or taking other medications.

Addiction and Mental Health Treatment

Addiction and Mental Health Treatment Options

Inpatient Rehabilitation:
- Inpatient rehabilitation, also known as residential treatment, involves individuals residing within a treatment facility for a specified duration. This structured environment provides intensive care and support.
Outpatient Programs:
- Outpatient programs offer flexibility, allowing individuals to receive treatment while continuing their daily lives. They attend therapy sessions, counseling, and other interventions on a scheduled basis.
Detoxification (Detox):
- Detox is the initial phase of treatment, focusing on safely and systematically removing substances from the body. It is often conducted under medical supervision to manage withdrawal symptoms.
Therapy and Counseling:
- Various therapeutic modalities, including individual counseling, group therapy, and family therapy, are crucial components of addiction and mental health treatment. These sessions help individuals explore and address underlying issues.
Medication-Assisted Treatment (MAT):
- MAT involves the use of medications, in conjunction with counseling and behavioral therapies, to address substance use disorders. It is particularly effective for opioid and alcohol addictions.
Dual Diagnosis Treatment:
- Dual Diagnosis Treatment addresses co-occurring mental health disorders alongside substance use disorders. It involves integrated interventions to holistically address both aspects of an individual’s well-being.
Holistic Therapies:
- Holistic approaches incorporate alternative therapies such as yoga, meditation, art therapy, and mindfulness. These practices aim to promote overall well-being and support recovery.
Support Groups:
- Support groups, like those following the 12-step model (e.g., Alcoholics Anonymous, Narcotics Anonymous), provide a community for individuals to share experiences, seek guidance, and foster mutual support.
Sober Living Homes:
- Sober living homes offer a transitional and supportive environment for individuals in recovery. They provide a structured living arrangement to reinforce sobriety.
Mental Health Treatment:
- Mental health treatment specifically addresses psychiatric conditions. It may involve therapy, medication management, and other interventions to enhance emotional well-being.
Cognitive-Behavioral Therapy (CBT):
- CBT is a goal-oriented therapeutic approach that focuses on identifying and changing negative thought patterns and behaviors. It is effective for both addiction and mental health concerns.
Dialectical Behavior Therapy (DBT):
- DBT combines cognitive-behavioral techniques with concepts of acceptance and mindfulness. It is particularly beneficial for individuals with emotional dysregulation.
Motivational Interviewing (MI):
- MI is a client-centered counseling style aimed at eliciting behavior change by helping individuals explore and resolve ambivalence. It is effective in the early stages of recovery.
Residential Treatment Centers:
- Residential facilities provide immersive and structured treatment experiences for individuals requiring a more extended and intensive intervention.
Community-Based Programs:
- Programs within the community offer accessible and community-centered support for individuals with mental health concerns.
Inpatient Mental Health Treatment:
- Inpatient mental health treatment involves individuals residing within a treatment facility designed to provide a controlled and supportive environment for managing mental health conditions.

Does Insurance Cover Addiction and Mental Health Treatment?

Typically, yes. The coverage of addiction treatment by insurance can vary depending on the type of insurance plan, specific policy details, and the individual’s needs and circumstances.

Conclusion

Benzonatate (Tessalon Perles) can help relieve coughs, but it’s important to understand potential side effects and interactions. Seek medical help immediately if you experience unusual reactions such as rash, trouble breathing, restlessness, hallucinations, or convulsions, as these may signal an overdose or allergic response. Store the medication safely, avoid alcohol, and follow dosing instructions exactly.

If you miss a dose, take the next one at the regular time—do not double up. Tell your healthcare provider if symptoms persist, or if you are pregnant, breastfeeding, or have concerns about use in children under 10 or interactions with other medications. Taking benzonatate as prescribed helps reduce risks and supports safe, effective symptom relief.

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FAQs

Can Benzonatate cause allergic reactions?

Yes, although rare, it can cause severe allergic reactions, including rash, itching, swelling, severe dizziness, and trouble breathing.

Does Benzonatate cause drowsiness?

Yes, drowsiness is a common side effect.

Can Benzonatate cause dizziness?

Yes, dizziness is a reported side effect and can impair coordination and alertness.

Are there any serious side effects of Benzonatate?

Serious side effects include mental/mood changes, confusion, hallucinations, and severe allergic reactions.

Is it safe to take Benzonatate with other medications?

You should consult your healthcare provider as Benzonatate can interact with other CNS depressants and medications that cause drowsiness.

Can benzonatate affect the cough reflex, and should I talk to a healthcare provider about it?

Yes, benzonatate works by numbing the cough reflex, and it’s important to consult a healthcare provider to ensure safe and appropriate use.

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Medical Disclaimer

At California Prime Recovery, our Editorial and Clinical Review Team is dedicated to delivering accurate, trustworthy, and compassionate content on addiction and mental health treatment. Every article is carefully written, reviewed, and verified by experienced professionals—including licensed clinicians, medical reviewers, and editorial experts—to ensure the highest standards of quality and reliability. Our goal is to empower individuals and families with the knowledge they need to make informed decisions about care and recovery.