chlorhexidine gluconate + lidocaine hydrochloride: prescribing and clinical use
Focused clinical detail for use alongside current product information, local policy and patient-specific assessment.
chlorhexidine gluconate + lidocaine hydrochloride: clinical details
Prescribing considerations
- Restrict use to necessary symptomatic relief; it is not intended for prolonged continuous or repeated use.
- Assess severe or persistent sore throat, dysphagia, high fever, headache, nausea or vomiting.
- Consider aspiration risk because excessive oropharyngeal anaesthesia can impair swallowing.
- The formulation contains ethanol and propylene glycol; the stated ethanol quantity is not expected to produce noticeable effects.
Contraindications and cautions
- Age under 12 years.
- Hypersensitivity to any component, particularly a history suggesting chlorhexidine allergy.
Monitoring
- No routine laboratory monitoring is specified for short-term local use.
- Review for hypersensitivity, altered swallowing, marked oral irritation or persistent or worsening symptoms.
- Consider systemic lidocaine toxicity after substantial misuse or ingestion; early features can include neurological and cardiovascular symptoms.
Clinical pharmacology
Lidocaine is an amide local anaesthetic that inhibits sodium-channel-dependent generation and conduction of nerve impulses. Chlorhexidine is a bisbiguanide antiseptic with bactericidal or bacteriostatic activity against a range of organisms. Chlorhexidine is poorly absorbed from mucosa; absorbed lidocaine undergoes extensive hepatic metabolism.
Formulation and product differences
- The selected preparation is a sugar-free, lemon-flavoured oromucosal spray in a metered-pump glass bottle.
- It contains ethanol and propylene glycol as excipients with known effects.
- Avoid eye contact, store below the stated temperature limit and discard six months after first opening.
chlorhexidine gluconate + lidocaine hydrochloride preparations and strengths
Oromucosal preparation
Route: Oromucosal
Strengths: 0.2% + 0.05% w/v
chlorhexidine gluconate + lidocaine hydrochloride interactions
Important interactions are unlikely with appropriate local use, but theoretical lidocaine interactions exist. Tell a pharmacist or prescriber about all medicines and supplements.
Propranolol or cimetidine
May reduce hepatic blood flow or lidocaine clearance, although a clinically relevant interaction is unlikely with this topical spray.
Beta blockers and anti-arrhythmics such as mexiletine
Cardiac-depressant effects can be additive with systemic lidocaine, but this is unlikely to be clinically relevant during appropriate topical use.
Phenytoin or barbiturates
Long-term use can increase lidocaine metabolism; this is mainly a theoretical concern for the spray.
Sources
These sources were used to prepare and review this medicine page.
Prepared and reviewed by the iatroX editorial team.