Maxitrol (Neomycin Sulfate, Polymyxin B Sulfate, Dexamethasone)

Maxitrol is used in ophthalmology to treat bacterial infections and inflammatory conditions of the eye.

• Bacterial conjunctivitis: reduces bacterial load and associated inflammation in the conjunctiva.
• Iritis and uveitis: diminishes intra‑ocular inflammation and pain.
• Post‑operative eye inflammation: controls swelling and prevents infection after ocular surgery.
• Keratitis: combats bacterial keratitis while alleviating corneal edema and discomfort.

• Neomycin inhibits bacterial protein synthesis by binding to the 30S ribosomal subunit, while Polymyxin B disrupts the bacterial cell‑membrane integrity, providing broad‑spectrum antimicrobial activity. Dexamethasone, a glucocorticoid, binds intracellular receptors and modulates gene transcription to suppress inflammatory mediators, reducing edema, leukocyte infiltration, and cytokine release in ocular tissues.

Adverse reactions may occur with topical use of Maxitrol. Patients should be monitored for any discomfort or unexpected changes in vision.

Common Side Effects

• Burning or stinging sensation upon instillation.
• Transient blurred vision.
• Mild ocular itching or redness.
• Temporary foreign‑body feeling.

Serious or Rare Side Effects

• Severe allergic reaction (anaphylaxis) with swelling or difficulty breathing.
• Corneal ulceration or secondary ocular infection.
• Increased intra‑ocular pressure leading to glaucoma.
• Cataract formation with prolonged use.

Use Maxitrol only under the direction of an eye‑care professional and observe the following precautions.

• Assess for viral or fungal eye infection: avoid use if non‑bacterial infection is suspected.
• Monitor intra‑ocular pressure: regular checks are advised during extended therapy.
• Limit duration of treatment: prolonged use may increase risk of cataract or glaucoma.
• Avoid in patients with known hypersensitivity to any component.
• Store at ambient temperature: keep in the original container, protect from moisture and light.

Topical Maxitrol may interact with other ophthalmic agents; consider the following interaction categories.

Major Interactions (Avoid)

• Systemic aminoglycosides: may increase risk of nephrotoxicity when absorbed.
• Systemic corticosteroids: can augment systemic glucocorticoid effects.
• Antiviral eye drops (e.g., acyclovir): may reduce antiviral efficacy.

Moderate Interactions (Monitor Closely)

• Other topical antibiotics: assess for additive antimicrobial effect and resistance.
• Additional corticosteroid eye preparations: monitor for cumulative steroid exposure.
• Ocular non‑steroidal anti‑inflammatory drugs: watch for corneal healing delays.