| Re: How long does the red-eye effect usually last?
To put it more plainly, you don't want anything that is marketed as a redness reducer (a vasoconstrictor). Antihistamine drops are fine, but stay away from drops that use naphazoline Hcl, tetrahydrozaline Hcl and phenylephrine Hcl - and that doesn't just include Visine, but pretty much all of the Clear Eyes drops, Naphcon, and any others marketed for red eyes. Get the drops intended for allergies, which use pheniramine maleate. They don't work as quickly, or as effectively, but they won't increase your risk of developing glaucoma or conjunctival xerosis (dry eye), or if you use redness removing drops too frequently, the rebound effect, where your eyes will be even more red than they were before you applied the drops after they wear off.
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