Tetrahydrozoline is a vasoconstrictor. Visine eye drop works by narrowing swollen blood vessels in the eyesย to reduceย eyeย redness. Visineย (for theย eyes) is
Tetrahydrozoline is a vasoconstrictor. Visine eye drop works by narrowing swollen blood vessels in the eyesย to reduceย eyeย redness. Visineย (for theย eyes) is