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Morphine sulphate

Morphine
Morphin - Morphine.svg
Morphine-from-xtal-3D-balls.png
Clinical data
Pronunciation /ˈmɔːrfn/
Trade names MScontin, Oramorph, Sevredol, and others
AHFS/Drugs.com Monograph
Pregnancy
category
  • AU: C
  • US: C (Risk not ruled out)
Dependence
liability
Physical: High
Psychological: Moderate
Addiction
liability
High
Routes of
administration
Inhalation (smoking), insufflation (snorting), by mouth (PO), rectal, subcutaneous (SC), intramuscular (IM), intravenous (IV), epidural, and intrathecal (IT)
Drug class opiate
ATC code
Legal status
Legal status
Pharmacokinetic data
Bioavailability 20% to 40% (by mouth), 36% to 71% (rectally), 100% (IV/IM)
Protein binding 30% to 40%
Metabolism Hepatic 90%
Onset of action 5 min (IV), 15 min (IM), 20 min (PO)
Biological half-life 2 h to 3 h
Duration of action 3 h to 7 h
Excretion Renal 90%, biliary 10%
Identifiers
CAS Number
  • 57-27-2 YesY
    64-31-3 (neutral sulfate),
    52-26-6 (hydrochloride)
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
ECHA InfoCard 100.000.291
Chemical and physical data
Formula C17H19NO3
Molar mass 285.34 g/mol
3D model (JSmol)
Solubility in water HCl & sulf.: 60 mg/mL (20 °C)
  

Morphine is a pain medication of the opiate type which is found naturally in a number of plants and animals. It acts directly on the central nervous system (CNS) to decrease the feeling of pain. It can be taken for both acute pain and chronic pain. Morphine is frequently used for pain from myocardial infarction and during labour. It can be given by mouth, by injection into a muscle, by injecting under the skin, intravenously, into the space around the spinal cord, or rectally. Maximum effect is around 20 minutes when given intravenously and 60 minutes when given by mouth, while duration of effect is between three and seven hours. Long-acting formulations also exist.

Potentially serious side effects include a decreased respiratory effort and low blood pressure. Morphine has a high potential for addiction and abuse. If the dose is reduced after long-term use, withdrawal may occur. Common side effects include drowsiness, vomiting, and constipation. Caution is advised when used during pregnancy or breast feeding, as morphine will affect the baby.

Morphine was first isolated between 1803 and 1805 by Friedrich Sertürner. This is generally believed to be the first isolation of an active ingredient from a plant.Merck began marketing it commercially in 1827. Morphine was more widely used after the invention of the hypodermic syringe in 1853–1855. Sertürner originally named the substance morphium after the Greek god of dreams, Morpheus, as it has a tendency to cause sleep.


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