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Substances causing vasoconstriction are called vasoconstrictors or vasopressors. Generalized vasoconstriction usually results in an increase in systemic blood pressure, but it may also occur in specific tissues causing a localized reduction in blood flow. — “Vasoconstriction - Wikipedia, the free encyclopedia”, en.wikipedia.org
Furthermore, these do not constitute vasoconstrictors, they elicit vasoconstriction through the release of adrenalin: which is a vasoconstrictor. Cannabis is listed as a vasoconstrictor and a vasodialator, this doesn't seem to make sense. — “Talk:Vasoconstrictor - Wikipedia, the free encyclopedia”, en.wikipedia.org
Cutaneous veins also are richly innervated with sympathetic vasoconstrictor fibers. This result was expected since vasoconstrictor tone in the facial area is known to be generally low (van der. — “Blushing - Wikipedia, the free encyclopedia”, en.wikipedia.org