methyl salicylate: clinical use

Prescribing considerations

• Confirm that the intended use matches the product's licensed skin-hardening or bed-sore-prevention indications; other methyl-salicylate products have different formulations and indications.
• Pressure-ulcer risk requires a wider prevention plan rather than reliance on a topical preparation alone.
• Consider systemic salicylate exposure with extensive, repeated or inappropriate application, particularly in patients taking warfarin.
• Account for the highly alcoholic, flammable vehicle and its potential to burn damaged skin.

Contraindications and cautions

• Hypersensitivity to methyl salicylate or any excipient.
• Do not apply to broken skin.
• External use only; avoid ignition sources.

Monitoring

• Check skin integrity before use and review new irritation or burning.
• In warfarin-treated patients, assess for bruising or bleeding and consider whether anticoagulation monitoring is required.
• Assess urgently after ingestion or suspected substantial exposure.

Clinical pharmacology

Methyl salicylate is a lipophilic salicylate ester with rubefacient activity. It penetrates intact skin, is hydrolysed to salicylic acid and can produce measurable systemic salicylate exposure.

Formulation and product differences

• Surgical Spirit BP is a cutaneous solution containing methyl salicylate in industrial methylated spirit, with castor oil and diethyl phthalate.
• Its highly alcoholic and flammable formulation is not interchangeable with methyl-salicylate creams, rubs, gels or sprays.