Visine

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Visine® is a brand of eye drops produced by Pfizer Inc.

Contents 1 Visine® Original 1.1 Administration 1.2 Adverse effects 2 References 3 External link

[edit] Visine® Original

The active ingredient in the original Visine® formulation is tetrahydrozoline hydrochloride which is a vasoconstrictor, and therefore constricts the eye's superficial blood vessels to "get the red out", as claimed in Pfizer's advertising[1].

[edit] Administration

As with other eye drops, Visine® is administered topically with 1 to 2 drops applied to the affected eye(s) up to 4 times daily ^{[citation needed]}.

[edit] Adverse effects

• Reducing the blood supply to the eye can prevent, or at least prolong, the healing cycle. Thus, the use of Visine® and other similar products is not helpful in healing the eyes ^{[citation needed]}.

• Use will create a rebound after a couple of hours and make the eye look even redder. Prolonged use can permanently dilate blood vessels, so use should be limited to 1 or 2 times.

• Those using Visine® Original frequently report stinging and burning upon application^[1].

• Although the use of Visine® as a poison to induce diarrhea has been discounted as an urban legend[2], systemic complications have been reported as a result of poisoning and accidental ingestion^[2][3][4].

[edit] References

[edit] External link

• Pfizer's Visine webpage