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Tetrahydrozoline

Tetrahydrozoline

IUPAC name	2-(1-tetralinyl)-4,5-dihydro-1H-imidazole
Identifiers
CAS number
PubChem	5419
SMILES	C1CC(C2=CC=CC=C2C1)C3=NCCN3
Properties
Molecular formula	C₁₃H₁₆N₂
Molar mass	200.27954
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

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.

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Tetrahydrozoline is widely believed to cause violent diarrhea if administered orally, as in a few drops of Visine in an unsuspecting person's beverage. However, this is an urban legend, and the actual results may vary from severe nausea and vomiting to seizures or a coma.^[1] Diarrhea is not a side effect.