What Is Naphazoline? Uses, Dosage, and What You Need to Know in 2026

If you've ever reached for Clear Eyes or Naphcon-A to get the red out of your eyes, you've used naphazoline. It's one of the oldest and most widely used active ingredients in OTC eye care. This guide explains what naphazoline is, how it works, how to use it correctly, and what you need to know about its availability in 2026.

What Is Naphazoline?

Naphazoline is a sympathomimetic amine — a drug that mimics the effects of the sympathetic nervous system. Specifically, it acts as an alpha-adrenergic receptor agonist, stimulating alpha-1 and alpha-2 receptors in blood vessel walls. When applied to the conjunctiva (the white of your eye) or nasal lining, this causes blood vessels to constrict (narrow), reducing redness and swelling rapidly.

Naphazoline was first patented in 1934 and entered clinical use in 1942, making it one of the longest-used compounds in OTC eye care. It is available as naphazoline hydrochloride (HCl) — the salt form — in concentrations ranging from 0.012% to 0.1%.

What Is Naphazoline Used For?

Naphazoline has two main OTC applications:

Ophthalmic use (eye drops): Temporary relief of eye redness caused by minor irritants — dust, wind, smoke, pollen, chlorine from swimming, prolonged screen use, or dry environments. Found in Clear Eyes, Naphcon, Vasocon, Naphcon-A, Visine-A, and many store-brand equivalents.

Nasal use (nasal drops/spray): Temporary relief of nasal congestion from the common cold, hay fever, sinusitis, or other upper respiratory conditions. Available as 0.05% nasal drops.

Naphazoline is a symptom reliever, not a treatment for the underlying cause of redness or congestion. It does not treat infections, allergies, or inflammation — it only reduces the visible appearance of blood vessel dilation.

Brand Names That Contain Naphazoline

Standalone naphazoline has been discontinued as a standalone product in the US. It is currently available in these combination products:

Naphazoline + Glycerin: Clear Eyes Redness Relief, Clear Eyes for Dry Eyes Plus Redness Relief

Naphazoline + Pheniramine: Naphcon-A, Opcon-A, Visine-A, AK-Con-A (allergy + redness relief)

Naphazoline + Zinc Sulfate: Clear Eyes ACR, VasoClear A (astringent + redness relief)

Naphazoline Dosage: How to Use It Correctly

Always follow the specific label directions for the product you're using. General dosing guidelines:

OTC eye drops (0.012%–0.027%): 1–2 drops in affected eye(s) up to 4 times daily; do not use for more than 72 hours

Rx eye drops (0.1%): 1–2 drops every 3–4 hours as needed (under provider guidance)

Nasal drops (0.05%): 1–2 drops in each nostril, no more than every 6 hours; adults and children 12 and over only

Key Safety Rules

Do not use for more than 72 hours — overuse causes rebound redness

Remove contact lenses before use and wait 15 minutes before reinserting

Do not use if you have narrow-angle glaucoma (check with your doctor)

Do not touch the dropper tip to your eye or any surface — this contaminates the bottle

Stop use and see a doctor if eye pain, vision changes, or worsening redness occurs

Keep out of reach of children — accidental ingestion can be life-threatening in infants

Naphazoline and Controlled Substances

Naphazoline is not a controlled substance. It is not scheduled by the DEA and does not require a prescription for OTC formulations. There are no refill restrictions or special prescribing requirements for naphazoline products.

Note: While naphazoline is occasionally reported to be misused recreationally (particularly by people seeking to mask eye redness), it has no recognized addiction potential and is not tracked as a drug of abuse by the DEA.

What's Changed in 2026

The main change patients encounter in 2026 is that standalone naphazoline was discontinued by manufacturers. The drug remains widely available in combination products with glycerin, pheniramine, or zinc sulfate. If you've been looking for plain naphazoline and can't find it, look for the brand-name combination products described above.

Want to understand the science behind how naphazoline works? Read our mechanism of action explainer. And if you're having trouble finding a naphazoline product at a pharmacy near you, medfinder can help you locate it.