Alternatives to Eyemycin If You Can't Fill Your Prescription

If your pharmacy doesn't have Eyemycin (erythromycin ophthalmic ointment 0.5%) in stock, there are several well-established alternatives your doctor can prescribe. The right substitute depends on your diagnosis, age, infection severity, and preference for drops versus ointment.

This guide covers the most commonly used alternatives, how they compare to erythromycin, and what to discuss with your prescriber.

Why You Might Need an Alternative to Eyemycin

Erythromycin ophthalmic ointment has been in and out of shortage since 2009. As of 2026, Bausch & Lomb is the sole major commercial manufacturer in the U.S., making supply fragile. On top of availability issues, erythromycin's clinical effectiveness has also been declining for non-neonatal use — some studies report Staphylococcal resistance rates as high as 70% among ocular isolates. Many ophthalmologists were already using alternatives even before the shortage intensified.

Alternative 1: Tobramycin Ophthalmic (Tobrex)

Tobramycin is an aminoglycoside antibiotic available as both 0.3% eye drops and 0.3% ointment. It is one of the most widely used topical ophthalmic antibiotics and is generally well-stocked at most pharmacies.

Best for: Bacterial conjunctivitis, corneal infections, gram-negative coverage including Pseudomonas

Pros: Broad gram-negative coverage; available in drops (easier for many patients); generic available

Cons: Less effective against some gram-positive bacteria; potential for eye irritation with prolonged use

Dosing: Typically 1-2 drops (or 0.5-inch ribbon of ointment) every 4 hours, increasing to every 1-2 hours for severe infections

Alternative 2: Azithromycin Ophthalmic (AzaSite)

Azithromycin 1% ophthalmic solution (AzaSite) is a macrolide antibiotic — the same class as erythromycin — but with a broader spectrum and convenient once-daily dosing after the first two days. The FDA, CDC, and American Academy of Ophthalmology have all recommended it as the primary alternative to erythromycin for superficial ocular infections in non-neonatal patients.

Best for: Bacterial conjunctivitis, blepharitis, meibomian gland dysfunction (MGD); adults and children over 1 year

Pros: Broader spectrum than erythromycin; high tissue penetration; drops rather than ointment (no blurred vision); once-daily after day 2

Cons: Expensive without insurance ($200+ per bottle); no generic available; AzaSite itself has been listed in shortage as of 2026; not effective against Pseudomonas

Alternative 3: Bacitracin Ophthalmic Ointment

Bacitracin ophthalmic ointment is one of the closest structural alternatives to erythromycin — also an ointment, also with strong gram-positive coverage. It works by destroying the bacterial cell wall (bactericidal) rather than inhibiting protein synthesis. Because bacitracin is not available in pill form, there is less systemic resistance pressure compared to erythromycin.

Best for: Blepharitis, infectious keratitis prophylaxis, gram-positive bacterial infections

Pros: Lower resistance rates than erythromycin; ointment formulation; generically available

Cons: Ophthalmic bacitracin itself has faced shortage issues in 2025–2026; ointment form limits practical use for some patients; for adults only (not approved for neonates)

Alternative 4: Fluoroquinolone Eye Drops (Ciprofloxacin, Moxifloxacin, Ofloxacin)

Fluoroquinolone ophthalmic solutions and ointments (ciprofloxacin 0.3%, moxifloxacin 0.5%, ofloxacin 0.3%, levofloxacin 0.5%) offer the broadest spectrum coverage of any topical antibiotic group. They are typically reserved for moderate-to-severe infections, suspected Pseudomonas (common in contact lens wearers), or cases where first-line agents have failed.

Best for: Moderate-to-severe bacterial conjunctivitis, corneal ulcers, contact lens-related infections

Pros: Very broad spectrum (gram-positive and gram-negative); generally available; generic versions of ciprofloxacin and ofloxacin are inexpensive

Cons: Some resistance developing; drops only (except ciprofloxacin ointment); usually reserved for more serious infections

For Neonatal Use: What Replaces Eyemycin?

For neonatal prophylaxis, the alternatives are different. The CDC and AAP recommend that when erythromycin ointment is unavailable, neonates at risk for gonococcal exposure receive ceftriaxone 25–50 mg/kg intravenously or intramuscularly (maximum single dose 125–250 mg). This is for hospitals and birthing centers — not a home treatment.

Which Alternative Is Right for You?

The best alternative depends on your specific situation:

For mild conjunctivitis: Tobramycin drops or bacitracin ointment are first choices

For blepharitis or MGD: Azithromycin (AzaSite) is preferred if available

For contact lens wearers with conjunctivitis: Fluoroquinolone drops (moxifloxacin, ciprofloxacin)

For severe infections or corneal involvement: Fluoroquinolones or tobramycin under close ophthalmologic supervision

If you still want to try finding erythromycin before switching, medfinder can check which pharmacies near you have it in stock. For a full step-by-step search strategy, read our guide on how to find Eyemycin in stock near you.