|SMILES||Script error: No such module "collapsible list".|
|style="background: #F8EABA; text-align: center;" colspan="2" | Properties|
|Molar mass||200.28 g/mol|
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)|
Tetrahydrozoline is a derivative of imidazoline, which is found in over-the-counter eye drops and nasal sprays. Other derivatives include naphazoline, oxymetazoline, and xylometazoline. Poisoning can result from an overdose.
Tetrahydrozoline is an alpha agonist and its main mechanism of action is the constriction of conjunctival blood vessels. This serves to relieve the redness of the eye caused by minor ocular irritants.
An urban legend suggests that tetrahydrozoline can cause violent diarrhea if administered orally, such as by putting a few drops of Visine in an unsuspecting person's beverage. However, the actual results may be worse, varying from severe nausea and vomiting to seizures or a coma. Diarrhea is not a side effect.
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- "Visine Prank: Mickey Red Eyes". Snopes. 29 June 2009. Retrieved 28 July 2010.