an agent that causes narrowing of the blood vessels and therefore a decrease in blood flow. Vasoconstrictor drugs are alpha agonists (see sympathomimetic): they are used to raise the blood pressure in disorders of the circulation, shock, or severe bleeding and to maintain blood pressure during surgery (e.g. ephedrine, metaraminol, phenylephrine). Some vasoconstrictors (e.g. ephedrine, xylometazoline) have a rapid effect when applied to mucous membranes and may be used to relieve nasal congestion. If the blood pressure rises too quickly headache and vomiting may occur. A vasoconstrictor is often added to local anaesthetic solutions used in dentistry to prolong their effectiveness.

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  • vasoconstrictor — VASOCONSTRICTÓR, OÁRE, vasoconstrictori, oare, adj. Care provoacă vasoconstricţie. – Din fr. vaso constricteur. Trimis de bogdanrsb, 11.08.2002. Sursa: DEX 98  Vasoconstrictor ≠ vasodilatator Trimis de siveco, 03.08.2004. Sursa: Antonime … …   Dicționar Român

  • vasoconstrictor — adj. fisiol. Que provoca vasoconstricción. ⊆ farm. Dícese del fármaco que provoca vasoconstricción; está indicado en caso de disminución del tono vascular. Se opone a vasodilatador. Medical Dictionary. 2011 …   Diccionario médico

  • Vasoconstrictor — Vas o*con*strict or, a. (Physiol.) Causing constriction of the blood vessels; as, the vasoconstrictor nerves, stimulation of which causes constriction of the blood vessels to which they go. These nerves are also called {vasohypertonic}. [1913… …   The Collaborative International Dictionary of English

  • vasoconstrictor — vasoconstrictor, ra adj. Med. Que contrae los vasos sanguíneos. U. t. c. s. m.) …   Diccionario de la lengua española

  • vasoconstrictor — [vas΄ōkən strik′tər] adj. [ VASO + CONSTRICTOR] Physiol. causing constriction of the blood vessels: also vasoconstrictive n. a nerve or drug causing such constriction vasoconstriction n …   English World dictionary

  • vasoconstrictor — 1. An agent that causes narrowing of the blood vessel s. SYN: vasoconstrictive (2). 2. A nerve, stimulation of which causes vascular constriction. * * * va·so·con·stric·tor .vā zō kən strik tər n an agent (as a sympathetic nerve fiber or a drug)… …   Medical dictionary

  • vasoconstrictor — ► adjetivo/ sustantivo masculino FARMACIA Que provoca vasoconstricción, en especial los fármacos hipertensores: ■ la adrenalina es una sustancia vasoconstrictora. ANTÓNIMO vasodilatador * * * vasoconstrictor adj. y n. m. Med. Que produce… …   Enciclopedia Universal

  • vasoconstrictor — {{#}}{{LM V39486}}{{〓}} {{[}}vasoconstrictor{{]}}, {{[}}vasoconstrictora{{]}} ‹va·so·cons·tric·tor, to·ra› {{《}}▍ adj./s.m.{{》}} {{♂}}Referido especialmente a un medicamento,{{♀}} que produce vasoconstricción: • Una sustancia vasoconstrictora… …   Diccionario de uso del español actual con sinónimos y antónimos

  • vasoconstrictor — noun Date: 1877 an agent (as a sympathetic nerve fiber or a drug) that induces or initiates vasoconstriction …   New Collegiate Dictionary

  • vasoconstrictor — /vas oh keuhn strik teuhr, vay zoh /, n. Physiol., Pharm. a nerve or drug that causes vasoconstriction. [1875 80; VASO + CONSTRICTOR] * * * …   Universalium

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