Maxitrol (Neomycin Sulfate, Polymyxin B Sulfate, Dexamethasone)

Maxitrol is used to manage ocular infections and inflammatory conditions affecting the anterior segment of the eye.

• Bacterial conjunctivitis: reduces bacterial load and associated inflammation, helping to resolve infection.
• Keratitis: combats bacterial pathogens on the cornea while decreasing inflammatory swelling.
• Uveitis: suppresses intra‑ocular inflammation and prevents further tissue damage.
• Post‑operative ocular inflammation: controls postoperative swelling and prevents secondary infection after eye surgery.

• Neomycin sulfate inhibits bacterial protein synthesis by binding to the 30S ribosomal subunit, while polymyxin B sulfate disrupts bacterial cell‑membrane integrity, leading to rapid bacterial death. Dexamethasone, a potent glucocorticoid, binds intracellular glucocorticoid receptors and suppresses multiple inflammatory pathways, reducing cytokine release, vascular permeability, and leukocyte migration in ocular tissues.

Adverse reactions may occur with ocular administration of Maxitrol.

Common Side Effects

• Stinging or burning sensation upon instillation.
• Transient eye redness or mild conjunctival hyperemia.
• Tearing or increased lacrimation.
• Temporary blurred vision.
• Mild eye irritation or foreign‑body sensation.

Serious or Rare Side Effects

• Allergic reactions such as eyelid edema, rash, or anaphylaxis.
• Corneal ulceration or epithelial defect.
• Elevated intra‑ocular pressure leading to secondary glaucoma.
• Severe ocular pain or vision loss.
• Persistent infection despite therapy.

Before using Maxitrol, consider the following safety measures.

• Allergy assessment: avoid if known hypersensitivity to neomycin, polymyxin B, dexamethasone, or any excipients.
• Contact lens use: remove lenses before instillation and wait at least 15 minutes before reinserting.
• Systemic absorption: limit duration to prescribed course to reduce systemic corticosteroid exposure.
• Pregnancy and lactation: use only if the potential benefit outweighs the risk; consult a physician.
• Monitor intra‑ocular pressure: especially with prolonged dexamethasone use.
• Store at room temperature: keep in the original container, protect from light and moisture.

Maxitrol may interact with other ophthalmic agents.

Major Interactions (Avoid)

• Systemic corticosteroids: concurrent use may increase systemic glucocorticoid effects.
• Live vaccines: systemic absorption of dexamethasone could suppress immune response.
• Anticholinergic eye drops: may reduce the therapeutic effect of Maxitrol.

Moderate Interactions (Monitor Closely)

• Topical non‑steroidal anti‑inflammatory drugs (NSAIDs): increased risk of corneal toxicity.
• Other ophthalmic antibiotics: potential additive ocular irritation.
• Preservative‑containing contact lens solutions: may heighten local irritation.