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Morphine



Morphine (INN), the principal active agent in opium, is a powerful opioid analgesic drug. Like other opiates, morphine acts directly on the central nervous system (CNS) to relieve pain, and at synapses of the arcuate nucleus, in particular. Side effects include impairment of mental performance, euphoria, drowsiness, lethargy, and blurred vision. It also decreases hunger, inhibits the cough reflex, and produces constipation. Morphine is usually highly addictive when compared to other substances, and tolerance and physical and psychological dependence develop quickly. Patients on morphine often report insomnia and nightmares.


The word derives from Morpheus, the god of dreams in Greek mythology.
Morphine Drug

Administration
Morphine may be given parenterally as subcutaneous, intravenous, or epidural injections. The military sometimes issues morphine loaded in an autoinjector.

Orally, it comes as an elixir, concentrated solution, powder (for compounding) or in tablet form. Morphine is rarely supplied in suppository form. Due to its poor oral bioavailability, oral morphine is only one-sixth to one-third of the potency of parenteral morphine. Morphine is available in extended-release capsules for chronic administration, as well as immediate-release formulations.

Uses
Morphine is used legally:

analgesic in hospital settings for
Pain after surgery
Pain associated with trauma
In the relief of moderate to severe chronic pain
Cancer pain
Tooth extraction
As an adjunct to general anesthesia
In epidural anesthesia
For palliative care (i.e. to alleviate pain without curing the underlying reason for it)
As an antitussive for severe cough
As an antidiarrheal in chronic conditions (e.g., for diarrhea associated with AIDS)

Contraindications
Acute pancreatitis (this may be a result of morphine use as well)
Renal failure (due to accumulation of the metabolite morphine-6-glucuronide)

Pharmacology
Morphine is an opioid agonist whose main effect is binding to the -receptors in the central nervous system. This is thought to be the reason behind the analgesia, euphoria, physical dependence and respiratory depression. Morphine also binds with k-receptors, which are thought to mediate spinal analgesia, miosis and sedation.

Legal classification
In the United Kingdom, morphine is listed as a Class A drug under the Misuse of Drugs Act 1971.
In the United States, morphine is classified as a Schedule II drug under the Controlled Substances Act.
Internationally, morphine is a Schedule I drug under the Single Convention on Narcotic Drugs

History
Morphine was first isolated in 1804 by the German pharmacist Friedrich Wilhelm Adam Sertrner, who named it "morphium" after Morpheus, the Greek god of dreams. But it was not until the development of the hypodermic needle (1853) that its use spread. It was used for pain relief, and as a "cure" for opium and alcohol addiction. Its extensive use during the American Civil War resulted in over 400,000 sufferers from the "soldier's disease" (addiction), though some believe this to be erroneous .

Heroin (diacetylmorphine) was derived from morphine in 1874. As with other drugs, its possession without a prescription was criminalised in the US by the Harrison Narcotics Tax Act of 1914.

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Page Content: description morphine , morphine sulfate , generation morphine , effects morphine side , morphine pill , morphine pump , affect morphine side , morphine sulphate , morphine patch , effects morphine , addiction morphine .

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Regulatory or medical requirements may wary in different countries, this information is intended for U.S. citizens.

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