3 doctors weighed in:

What's the difference between naphcon and naphcon-a eye drops?

3 doctors weighed in
Dr. Richard Bensinger
Ophthalmology
2 doctors agree

In brief: Anti-allergic

Both drops contain a mild vasoconstrictor (naphazolamine) which can help whiten up allergically affected eyes.
Naphcon-a, an alcon company brand name, also contains pheneramine, which is a mild anti-histamine. So plain naphcon can briefly eliminate the redness but does not treat anything while naphcon a can decrease the redness but also treat the allergy.

In brief: Anti-allergic

Both drops contain a mild vasoconstrictor (naphazolamine) which can help whiten up allergically affected eyes.
Naphcon-a, an alcon company brand name, also contains pheneramine, which is a mild anti-histamine. So plain naphcon can briefly eliminate the redness but does not treat anything while naphcon a can decrease the redness but also treat the allergy.
Dr. Richard Bensinger
Dr. Richard Bensinger
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