Does Tessalon (Benzonatate) Raise Blood Pressure?
No, Tessalon (benzonatate) does not raise blood pressure. Benzonatate is not listed among medications known to elevate blood pressure in major hypertension guidelines, and the FDA drug label does not identify hypertension or blood pressure elevation as an adverse effect.
Evidence from FDA Drug Labeling
The official FDA prescribing information for Tessalon (benzonatate) lists potential adverse reactions including hypersensitivity reactions, CNS effects (sedation, headache, dizziness), GI upset, dermatologic reactions, and other effects such as nasal congestion—but blood pressure elevation is notably absent from this list 1. The drug is chemically related to para-aminobenzoic acid anesthetic agents (like procaine and tetracaine), and its adverse effects relate primarily to CNS and local anesthetic properties, not cardiovascular stimulation 1.
Guideline Evidence on Blood Pressure-Raising Medications
Multiple major hypertension guidelines comprehensively list medications and substances that can elevate blood pressure or interfere with antihypertensive therapy. Benzonatate is not mentioned in any of these lists 2, 3, 2, 4.
Medications That Actually Raise Blood Pressure
The guidelines consistently identify the following as problematic:
Oral decongestants (pseudoephedrine, phenylephrine) are explicitly listed as α-adrenergic agonists that significantly increase blood pressure, with pseudoephedrine raising systolic BP by approximately 1 mm Hg and heart rate by 2.8 beats/min 5
NSAIDs (nonsteroidal anti-inflammatory drugs) are among the most common medication classes that elevate BP through salt retention and loss of vasodilatory prostaglandins 2, 4
Corticosteroids, oral contraceptives, immunosuppressive agents (cyclosporine, tacrolimus), and stimulants are also recognized BP-raising agents 2, 6, 4
Critical Distinction: Antihistamines vs. Decongestants
It is essential to distinguish benzonatate from combination allergy products that may contain decongestants:
Second-generation antihistamines (loratadine, cetirizine, fexofenadine) and first-generation antihistamines do not raise blood pressure 5
Many OTC "allergy" products combine antihistamines with decongestants—products labeled "allergy and congestion" or "allergy-D" typically contain problematic decongestant components 5
Benzonatate is neither an antihistamine nor a decongestant; it is a non-narcotic antitussive (cough suppressant) that works by anesthetizing stretch receptors in the respiratory passages 1
Clinical Implications for Resistant Hypertension
When evaluating patients with resistant or uncontrolled hypertension, approximately 20% regularly use OTC medications that can raise blood pressure 3, 4. The 2025 AHA/ACC guidelines recommend a detailed medication review and removal of interfering agents 3, 4. However, the focus is on decongestants and NSAIDs, not antitussives like benzonatate 4, 5.
Safety Profile
Research using benzonatate for rapid oral anesthesia demonstrated no abnormal cardiac rhythms, ST segment depression, or clinically significant increases in mean arterial pressure or heart rate (changes did not exceed 20% from baseline) 7. This further supports the absence of hypertensive effects.
Bottom Line
Benzonatate (Tessalon Perles) can be safely used in patients with hypertension without concern for blood pressure elevation. If a patient taking benzonatate experiences elevated blood pressure, clinicians should look for other contributing factors—particularly concurrent use of decongestants, NSAIDs, or other known BP-raising agents—rather than attributing the elevation to benzonatate 3, 4, 5.