Clinical decision-support only. For use by licensed dental professionals. Not a substitute for professional judgment or a complete drug reference. Always verify with primary sources.
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Medication

Cyclobenzaprine

Skeletal muscle relaxant

Brand names: Flexeril, Amrix

Oral health effects

  • Xerostomia (dry mouth)

    Structurally TCA-like, so anticholinergic dry mouth is common. Sometimes prescribed for TMD-related muscle pain.

    Mechanism: Anticholinergic activity reduces salivary secretion.

    Clinical management: Hydration, salivary substitutes, high-fluoride caries prevention.

  • Unpleasant taste (dysgeusia)

    Unpleasant taste is reported in 1–3% of patients.

    Clinical management: Ask about altered or metallic taste, which can reduce appetite and oral comfort; reassure that it is drug-related and often fades. Rule out oral candidiasis or poor hygiene as contributors and encourage sugar-free options rather than sweet foods/drinks used to mask the taste.

Sources

  1. A Guide to Medications Inducing Salivary Gland Dysfunction, Xerostomia, and Subjective Sialorrhea: A Systematic Review Sponsored by the World Workshop on Oral Medicine VI. Wolff A, Joshi RK, Ekström J, et al. Drugs in R&D, 2017.
  2. Cyclobenzaprine prescribing information (FDA label) Preferred Pharmaceuticals Inc. / DailyMed, 2026.