Contraindications to Tessalon Perles (Benzonatate)
The only absolute contraindication to Tessalon Perles (benzonatate) is hypersensitivity to benzonatate or related compounds (para-aminobenzoic acid derivatives like procaine and tetracaine) 1. Crohn's disease is NOT a contraindication to benzonatate use.
Specific Contraindications
According to the FDA drug label, benzonatate has a single formal contraindication 1:
- Hypersensitivity to benzonatate or chemically related compounds (particularly para-amino-benzoic acid class anesthetic agents such as procaine and tetracaine)
Crohn's Disease and Benzonatate
There is no evidence or guidance suggesting that Crohn's disease contraindicates benzonatate use. The extensive Crohn's disease management guidelines 2, 3, 4 do not mention benzonatate as a problematic medication in this population. The drug label makes no reference to inflammatory bowel disease as a contraindication or precaution 1.
Critical Safety Warnings (Not Contraindications)
While not contraindications, these represent serious safety concerns 1:
High-Risk Situations:
- Children under age 10: Not approved; accidental ingestion has resulted in death within 15-20 minutes, with fatalities reported within one hour 1, 5
- Pregnancy Category C: Use only if clearly needed
- Nursing mothers: Unknown if excreted in breast milk; use with caution
Dangerous Administration Errors:
- Must swallow capsules whole - never break, chew, dissolve, cut, or crush
- Release in the mouth causes local anesthesia of oral mucosa and can produce choking
- If tongue/mouth/throat numbness occurs, avoid eating or drinking until resolved
Overdose Risk:
- Maximum dosing: 200 mg per dose, 600 mg per day maximum
- Overdose can cause restlessness, tremors, convulsions, coma, cardiac arrest, and death in adults 1, 6
- Deaths reported with ingestion of less than 30 pills (6000 mg total) 6
Adverse Reactions of Concern:
- Hypersensitivity reactions including bronchospasm, laryngospasm, cardiovascular collapse 1
- CNS effects: sedation, dizziness, mental confusion, visual hallucinations 1
Clinical Bottom Line
You can safely prescribe benzonatate to patients with Crohn's disease. The only reason to avoid it is documented hypersensitivity to benzonatate or related local anesthetics. Focus your safety counseling on proper administration (swallow whole, never chew), strict dosing limits, and keeping the medication away from children.