Tags: Chemical Compound, Chemical Substance.
Tetrahydrozoline (INN: Tetryzoline) a derivative of imidazoline is found in over-the-counter eye drops and nasal sprays. Other derivatives include naphazoline oxymetazoline and xylometazoline.Tetrahydrozoline is an alpha agonist and its main mechanism of action is the constriction of conjunctival blood vessels.