carmellose sodium: clinical use

Prescribing considerations

• Confirm symptoms are consistent with dry eye; pain, redness, visual change or deterioration warrants reassessment.
• Check contact-lens compatibility and preservative content for the exact preparation.
• Give contamination-avoidance advice and warn that temporary blurred vision may affect driving.
• Clinical experience supports use in children, although the selected product information reports no paediatric clinical-trial data.

Contraindications and cautions

• Hypersensitivity to carmellose sodium or any excipient.

Monitoring

• Assess symptom response and ocular tolerability.
• Investigate persistent symptoms, discharge, significant redness, pain or altered vision.
• Routine systemic monitoring is not expected because systemic exposure is negligible.

Clinical pharmacology

Carmellose sodium is a high-molecular-weight, viscous tear substitute. Its viscosity increases residence time on the ocular surface, and corneal penetration is unlikely.

Formulation and product differences

• The selected product is a clear, colourless to slightly yellow solution in a single-dose container.
• No preservative is listed.
• Single-dose containers must be used immediately after opening and not reused.
• Other products may differ in concentration, preservative content, container type and contact-lens instructions.

Eye drops

Route: Ophthalmic

Strengths: 0.5% w/v, 1.0% w/v