Epinephrine

CAS No:
51-43-4 Categories: , , ,
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Product Details:

  • CAS No: 51-43-4
  • AHFC code: 52:24.00 12:12.12 52:32.00 92:02.00*
  • Synonyms: ADR Adrenaline Adrenalin Adrenalin Chloride Adrenalina Adrenaline Adrenalinum D-Adrenaline D-Epifrin D-Epinephrine Epinefrin [Czech] Epinefrina [INN-Spanish] Epinephran Epinephrinum [INN-Latin] L-Adrenalin L-Adrenaline L-Adrenaline Base L-Epinephine L-Epinephrine L-Epirenamine Levoadrenaline Levoepinephrine Racepinefrina [inn-spanish] Racepinefrine Racepinefrinum [inn-latin] Racepinephrine
  • ATC Code: A01AD01 B02BC09 C01CA03 C01CA24 R01AA14 R03AA01 S01EA01
  • Chemical Formula: C53H83NO14
  • Molecular Weight: 183.2044
  • Assay/Purity: Typically NLT 98%
  • DrugBank: DB00668 (APRD00450, EXPT00496)
  • SMILES: CNC[C,H](O)C1=CC(O)=C(O)C=C1
  • InChl: UCTWMZQNUQWSLP-VIFPVBQESA-N
  • PubChem: 838
  • IUPAC:

Additional Details

Indication:
Used to treat anaphylaxis and sepsis. Also one of the body's main adrenergic neurotransmitters.
Pharmacodynamics:
Epinephrine is indicated for intravenous injection in treatment of acute hypersensitivity, treatment of acute asthmatic attacks to relieve bronchospasm, and treatment and prophylaxis of cardiac arrest and attacks of transitory atrioventricular heart block with syncopal seizures (Stokes-Adams Syndrome). The actions of epinephrine resemble the effects of stimulation of adrenergic nerves. To a variable degree it acts on both alpha and beta receptor sites of sympathetic effector cells. Its most prominent actions are on the beta receptors of the heart, vascular and other smooth muscle. When given by rapid intravenous injection, it produces a rapid rise in blood pressure, mainly systolic, by (1) direct stimulation of cardiac muscle which increases the strength of ventricular contraction, (2) increasing the heart rate and (3) constriction of the arterioles in the skin, mucosa and splanchnic areas of the circulation. When given by slow intravenous injection, epinephrine usually produces only a moderate rise in systolic and a fall in diastolic pressure. Although some increase in pulse pressure occurs, there is usually no great elevation in mean blood pressure. Accordingly, the compensatory reflex mechanisms that come into play with a pronounced increase in blood pressure do not antagonize the direct cardiac actions of epinephrine as much as with catecholamines that have a predominant action on alpha receptors.
Mode of Action:
Epinephrine works via the stimulation of alpha and beta-1 adrenergic receptors, and a moderate activity at beta-2 adrenergic receptors.
Metabolism:
Epinephrine is rapidly inactivated in the body and is degraded by enzymes in the liver and other tissues. The larger portion of injected doses is excreted in the urine as inactivated compounds and the remainder either partly unchanged or conjugated. The drug becomes fixed in the tissues and is inactivated chiefly by enzymatic transformation to metanephrine or normetanephrine either of which is subsequently conjugated and excreted in the urine in the form of sulfates and glucuronides. Either sequence results in the formation of 3-methoxy-4-hydroxy-mandelic acid which also is detectable in the urine. Main metabolic enzymes include MAO and COMT
Toxicity:
Skin, LD50 = 62 mg/kg (rat)
General Reference:
Yamashima T: Jokichi Takamine (1854-1922), the samurai chemist, and his work on adrenalin. J Med Biogr. 2003 May;11(2):95-102. Pubmed Bennett MR: One hundred years of adrenaline: the discovery of autoreceptors. Clin Auton Res. 1999 Jun;9(3):145-59. Pubmed
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