Lodoxamide
Brand names: Alomide
Lodoxamide is a topical ophthalmic mast cell stabiliser used to treat allergic eye disorders, including vernal and seasonal allergic conjunctivitis and vernal keratoconjunctivitis.
Adult dose
Paediatric dose
Dose independently re-sourced from UK Summary of Product Characteristics (SPC) via the eMC — clinician-reviewed. Always confirm against the product SmPC and your local formulary before prescribing.
Contraindications
- Known hypersensitivity to lodoxamide or any component of the medicament (§4.3 verbatim)
- Not a formal §4.3 contraindication but a §4.4 warning: ALOMIDE is not for injection
- Soft contact lenses during use — benzalkonium chloride may be absorbed by soft lenses and may change their colour; remove lenses before instillation and wait at least 15 minutes before reinsertion (§4.4)
Side effects
- Ocular discomfort (very common) — the most common adverse reaction in clinical trials
- Vision blurred, dry eye, eye pruritus, lacrimation increased, ocular hyperaemia (common)
- Eye pain, eye oedema, asthenopia, corneal deposits, conjunctival oedema, abnormal sensation in eye, foreign body sensation in eyes, eye discharge, eye irritation (uncommon)
- Corneal erosion, corneal scar, corneal abrasion, anterior chamber cell, corneal epithelium defect, keratitis, blepharitis, eye allergy, visual impairment, eyelid oedema, conjunctival disorder (rare)
- Dizziness, headache (uncommon); somnolence, dysgeusia (rare)
- Nausea (uncommon); abdominal discomfort (rare)
- Eyelid exfoliation (uncommon); rash (rare)
- Feeling hot (uncommon)
- Palpitations (not known)
- Nasal dryness, sneezing (rare)
Monitoring
- Do not exceed the recommended frequency of administration (§4.4)
- If initial burning or stinging persists, the patient should be advised to contact the prescribing physician (§4.4)
- Use with caution in dry eye patients and where the cornea may be compromised — benzalkonium chloride has been reported to cause eye irritation and symptoms of dry eyes, and may affect the tear film and corneal surface (§4.4)
- Patients should be monitored in case of prolonged use (§4.4)
- Response is usually evident within a few days, but up to four weeks of treatment is sometimes required (§4.2)
Clinical monograph
How it works
It stabilises mast cells and prevents the antigen-stimulated release of histamine and other inflammatory mediators that drive the ocular allergic response.
Prescribing in practice
- Acts prophylactically rather than as a rescue treatment, so it should be used regularly and continuously to be effective and may take some days to produce symptomatic benefit.
- Contact lenses should not be worn during treatment of allergic conjunctivitis, and the preservative may be absorbed by soft lenses.
- Transient stinging or burning on instillation is common but usually settles.
Monitoring
Treatment is monitored clinically by reviewing symptom control and ocular comfort, with the drops continued throughout the period of allergen exposure.
Counselling the patient
- Use the drops regularly every day as prescribed, not just when symptoms flare, because they work by preventing reactions.
- Remove contact lenses before instilling and follow your clinician's advice on when they can be reworn.
- Mild stinging when you put the drops in is normal and short-lived.
Evidence & guidelines
Mast cell stabilisers are an established option for allergic conjunctivitis and their place in therapy is supported by ophthalmology guidance and the SPC.
Reference: Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).
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