#vasoconstrictor__vasoconstrictive  any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure
  supertype:  agent  an active and efficient cause; capable of producing a certain effect; "their research uncovered new disease agents"
  subtype:  adrenergic_drug__adrenergic  drug that has the effects of epinephrine
     subtype:  phenylephrine  a powerful vasoconstrictor used to dilate the pupils and relieve nasal congestion
     subtype:  phenylpropanolamine  an adrenergic drug used in many preparations to relieve allergic reactions or respiratory infections
  subtype:  angiotensin__angiotonin__Hypertensin  any of several vasoconstrictor substances (trade name Hypertensin) that cause narrowing of blood vessels
     subtype:  angiotensin_I  a physiologically inactive form of angiotensin that is the precursor to angiotensin II
     subtype:  angiotensin_II  a potent vasopressor agent formed from angiotensin I
  subtype:  lypressin  an antidiuretic and vasoconstrictor used to treat diabetes insipidus
  subtype:  naphazoline__Privine__Sudafed  vasoconstrictor (trade names Privine and Sudafed) used in nasal sprays to treat symptoms of nasal congestion and in eyedrops to treat eye irritation
  subtype:  vasopressor  any agent that produces vasoconstriction and a rise in blood pressure (usually understood as increased arterial pressure)
  subtype:  low_temperature__coldness__cold  the absence of heat; "the coldness made our breath visible"; "come in out of the cold"; "cold is a vasoconstrictor"
     subtype:  iciness__icines__gelidity  coldness due to a cold environment
     subtype:  chilliness__coolness  the property of being moderately cold; "the chilliness of early morning"
     subtype:  frostiness  coldness as evidenced by frost
     subtype:  cool  the quality of being cool: "the cool of early morning"
  subtype:  noradrenaline  a catecholamine precursor of epinephrine that is secreted by the adrenal medulla and also released at synapses
  subtype:  epinephrine__epinephrin__adrenaline__Adrenalin  a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action
  subtype:  vasopressin__antidiuretic_hormone__ADH__Pitressin  hormone secreted by the posterior pituitary gland (trade name Pitressin) and also by nerve endings in the hypothalamus; affects blood pressure by stimulating capillary muscles and reduces urine flow by affecting reabsorption of water by kidney tubules
  subtype:  nicotine  an alkaloid poison that occurs in tobacco; used in medicine and as an insecticide

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