propamidine isetionate: clinical use

Prescribing considerations

• Confirm symptoms are consistent with a minor superficial eye infection; worsening symptoms or visual disturbance require reassessment.
• The preserved formulation contains benzalkonium chloride, which can irritate dry eyes and affect the tear film or compromised cornea.
• Acanthamoeba keratitis is a non-licensed, specialist-managed indication requiring consultant ophthalmology involvement.

Contraindications and cautions

• Hypersensitivity to propamidine isetionate or any formulation component.

Monitoring

• Assess for worsening redness, pain, irritation or visual disturbance.
• Monitor the corneal surface where use is prolonged, particularly in dry-eye disease or a compromised cornea.
• No routine systemic laboratory monitoring is specified.

Clinical pharmacology

Propamidine is an aromatic diamidine with bacteriostatic action against a range of organisms. Activity is retained in organic material such as tissue fluid, pus and serum. Product-specific pharmacokinetic data are unavailable.

Formulation and product differences

• The selected product is a multidose eye-drop solution preserved with benzalkonium chloride.
• Other excipients include ammonium chloride, sodium chloride, sodium hydroxide and water for injections.
• The bottle may be supplied with a separate administration aid. It should not be confused with dibrompropamidine eye ointment, which contains a different active ingredient.