Klarity A (Klarity-A) — Compare Prices at US & Canada Pharmacies

Klarity-A is a compounded ophthalmic antibiotic made by Imprimis (now Harrow) — the "A" denotes azithromycin, and the product is a preservative-free 1% azithromycin eye drop, essentially a compounding-pharmacy alternative to the FDA-approved brand AzaSite. Compounded formulations like this exist because they let prescribers order a preservative-free version, a different fill volume, or a price point outside the branded product, though they aren't FDA-approved in the same sense as a manufactured drug — they're prepared by a licensed compounding pharmacy under a physician's prescription rather than going through the standard new-drug approval process.

As an azithromycin-based eye drop, it works the same way AzaSite does: a macrolide antibiotic applied topically to treat bacterial conjunctivitis, effective against common causes such as Staphylococcus aureus, Streptococcus pneumoniae, and Haemophilus influenzae. Because it's applied directly to the eye rather than absorbed systemically, it avoids the drug interactions and systemic warnings associated with oral or IV macrolides like azithromycin tablets — QT prolongation and major drug-drug interactions aren't a meaningful concern with a few drops in the eye.

Because compounded formulations vary by pharmacy and aren't standardized the way FDA-approved drugs are, ask your prescriber or pharmacist about the specific formulation, preservative content, and expiration dating for the batch you're given, and confirm whether an FDA-approved alternative like AzaSite might be appropriate for your situation.