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Topical NSAID — Throat / Mouth

Benzydamine Hydrochloride

Brand names: Difflam, Difflam Forte

Benzydamine hydrochloride is a locally acting non-steroidal anti-inflammatory used as an oromucosal rinse or spray to relieve pain and inflammation of the mouth and throat, including post-tonsillectomy and oropharyngeal mucositis.

Dosing — being independently re-sourced

ClinCalc Pro is rebuilding its dose data from primary open sources — the manufacturer SmPC (eMC), the WHO Model Formulary and other official references — under clinician review. This drug's structured dose is not yet published here. Confirm all doses against the product SmPC and your local formulary before prescribing.

Clinical monograph

How it works

It has local analgesic, anti-inflammatory and mild local anaesthetic and antiseptic properties when applied to inflamed mucosa, with negligible systemic absorption across intact mucosa.

Prescribing in practice

  • Applied topically to the oropharynx only; the rinse should not be swallowed and is not a substitute for systemic antimicrobial or analgesic therapy where indicated.
  • Transient stinging, numbness or tingling of the mouth is common; diluting the rinse with water can reduce this if it occurs.
  • Use is short-term for symptomatic relief; review if symptoms persist or worsen rather than continuing indefinitely.

Monitoring

No routine laboratory monitoring is required; reassess if oropharyngeal symptoms fail to settle or local irritation persists.

Counselling the patient

  • Gargle or rinse and then spit out; do not swallow the solution.
  • A brief stinging or numb sensation is expected and settles quickly.
  • Seek review if mouth or throat symptoms persist beyond a few days.

Evidence & guidelines

Topical benzydamine is an established symptomatic treatment for oropharyngeal pain and is recommended for radiation-induced oral mucositis in supportive-care guidance.

Reference: Cochrane Review (Clarkson et al. 2014) Oral Mucositis; NICE NG84; Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. Monograph status: clinician-reviewed (2026-07-04).

Related

Curated clinical cross-links plus same-class fallbacks.

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