vasoconstrictors
Blood vessel narrowers
Vasoconstrictors are substances that narrow blood vessels.
When blood vessels constrict, blood pressure rises and blood flow to certain areas decreases.
Caffeine, nicotine, and cocaine are vasoconstrictors, as are certain medications used to treat low blood pressure or reduce nasal congestion: The decongestant works as a vasoconstrictor to shrink swollen nasal passages.
Adrenal stress hormone
- norepinephrineAlertness and stress hormone
- pseudoephedrineNasal passage clearing medication
- decongestantDrug reducing nasal swelling
- adrenalineEmergency response hormone
dopamine · vasopressin · ergotamine · caffeine · amphetamine · cocaine · prescription · dosage
Smallest arterial vessels
- smooth muscleInvoluntary contractile tissue
- blood vesselsTubes carrying circulating fluid
- vasoconstrictionArterial walls contracting inward
- blood pressureCirculatory force measurement
circulation · capillaries · narrowing · diameter · lumen · systemic · arteries · veins
Abnormally reduced arterial pressure
- shockViolent sudden disturbance
- sepsisDangerous inflammatory infection response
- hemorrhageProfuse discharge of blood
- anaphylaxisSevere systemic allergic reaction
resuscitation · ICU · emergency · cardiac · surgery · anesthesia · epidural · spinal
epinephrine
Adrenal stress hormone
- norepinephrineAlertness and stress hormone
- pseudoephedrineNasal passage clearing medication
- decongestantDrug reducing nasal swelling
adrenaline · dopamine · vasopressin · ergotamine · caffeine · amphetamine · cocaine · prescription · dosage · receptor
arterioles
Smallest arterial vessels
- smooth muscleInvoluntary contractile tissue
- blood vesselsTubes carrying circulating fluid
- vasoconstrictionArterial walls contracting inward
blood pressure · circulation · capillaries · narrowing · diameter · lumen · systemic · arteries · veins · vascular
hypotension
Abnormally reduced arterial pressure
- shockViolent sudden disturbance
- sepsisDangerous inflammatory infection response
- hemorrhageProfuse discharge of blood
anaphylaxis · resuscitation · ICU · emergency · cardiac · surgery · anesthesia · epidural · spinal · infusion
- stimulantscaffeine, amphetamine, amphetamines, methamphetamine, cocaine
- heart drugsdigoxin, digitalis, quinidine, lidocaine, antiarrhythmics
- hemostaticsthrombin, fibrin, platelets, clotting factor, hemostat
vasoconstrictorsvasodilators
Agents widening blood vessels
dilators · nitric oxide · nitroglycerin · nitrates · alpha-blockers