Chemistry:Orciprenaline

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Short description: Chemical compound
Orciprenaline
Orciprenaline.svg
Clinical data
Other namesMetaproterenol (USAN US)
AHFS/Drugs.comMonograph
MedlinePlusa682084
Pregnancy
category
  • AU: A
  • US: C (Risk not ruled out)
Routes of
administration
Inhalation (MDI) and tablets
ATC code
Legal status
Legal status
Pharmacokinetic data
Bioavailability3% if inhaled, 40% if taken orally
MetabolismGastrointestinal and hepatic
Elimination half-life6 hours
Identifiers
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
Chemical and physical data
FormulaC11H17NO3
Molar mass211.261 g·mol−1
3D model (JSmol)
ChiralityRacemic mixture
Solubility in water9.7 mg/mL (20 °C)
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Orciprenaline, also known as metaproterenol, is a bronchodilator used in the treatment of asthma.[1][2] Orciprenaline is a moderately selective β2 adrenergic receptor agonist that stimulates receptors of the smooth muscle in the lungs, uterus, and vasculature supplying skeletal muscle, with minimal or no effect on α adrenergic receptors. The pharmacologic effects of β adrenergic agonist drugs, such as orciprenaline, are at least in part attributable to stimulation through β adrenergic receptors of intracellular adenylyl cyclase, the enzyme which catalyzes the conversion of ATP to cAMP. Increased cAMP levels are associated with relaxation of bronchial smooth muscle and inhibition of release of mediators of immediate hypersensitivity from many cells, especially from mast cells.

Possible side effects

  • tremor
  • nervousness
  • dizziness
  • weakness
  • headache
  • nausea
  • tachycardia
Rare side effects that could be life-threatening
  • increased difficulty breathing
  • rapid or increased heart rate
  • irregular heartbeat
  • chest pain or discomfort

Brand names

  • Alupent
  • Metaprel
  • Orcibest

References