Aminophenazone

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Aminophenazone
INN: aminophenazone
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Clinical data
AHFS/Drugs.com International Drug Names
ATC code
Pharmacokinetic data
Metabolism N-demethylation[1]
Identifiers
CAS Number
PubChem CID
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
ECHA InfoCard 100.000.332 Edit this at Wikidata
Chemical and physical data
Formula C13H17N3O
Molar mass 231.29358
3D model (JSmol)
  (verify)

Aminophenazone (or aminopyrine, amidopyrine, Piramidon) is a pyrazolone with analgesic, anti-inflammatory, and antipyretic properties but has risk of agranulocytosis. A breath test with 13C-labeled aminopyrine has been used as a non-invasive measure of cytochrome P-450 metabolic activity in liver function tests.[1] It is also used in measuring the total body water in the human body system.[2] Production and use have been banned in France, Thailand and India.

History[edit]

Aminophenazone was first synthesized by Friedrich Stolz and Ludwig Knorr in the late nineteenth century, and sold as an anti-fever medicine known as Pyramidon by Hoechst AG from 1897 until its eventual replacement by the safer propyphenazone molecule.

Symptoms[edit]

Symptoms of exposure to this compound include:[3]

  • allergic reactions
  • strong spasmolytic effect on smooth muscle of peripheral blood vessels
  • irritability
  • palsy
  • copious sweating
  • dilated pupils
  • sharp drop then rise in body temperature
  • dysuria
  • dyspnea
  • anxiety
  • rectal tenesmus
  • urinary frequency
  • intermittent fever
  • fatty infiltration of the liver
  • heart muscle degeneration
  • death due to circulatory failure following cardiovascular collapse

Agranulocytosis often occurs. Ingestion may cause central nervous system stimulation, vomiting, convulsions, cyanosis, tinnitus, leukopenia, kidney damage and coma. Ingestion may also lead to nausea, mental disturbances, methemoglobinemia, chocolate-colored blood, dizziness, epigastric pain, difficulty in hearing, thready pulse and liver damage.

Other symptoms reported via ingestion include hemolytic anemia, porphyria and severe gastrointestinal bleeding. Bone marrow depression also occurs. Rare eye effects include acute transient myopia.

Chronic symptoms include:

When heated to decomposition this compound emits toxic fumes of nitrogen oxides.

Metabolism[edit]

Amidopyrine is metabolized by demethylation and acetylation. Amidopirina metabolites are 4-aminoantipyrine, metilaminoantipirin, rubazonovaya and metilrubazonovaya acid. These acids have a reddish color. Due to the presence in the urine of these acids makers amidopirina high doses, it can have a reddish brownish coloration.[4]

References[edit]

  1. ^ a b Caubet, M. S.; Laplante, A.; Caillé, J.; Brazier, J. L. (4 Jan 2007). "[13C]Aminopyrine and [13C]Caffeine Breath Test: Influence of Gender, Cigarette Smoking and Oral Contraceptives Intake". Isotopes in Environmental and Health Studies. 38 (2): 71–77. doi:10.1080/10256010208033314. 
  2. ^ "Aminophenazone — Compound Summary". PubChem. The National Library of Medicine. 2005-03-26. Retrieved June 12, 2008. 
  3. ^ Pubchem. "aminophenazone". pubchem.ncbi.nlm.nih.gov. Retrieved 2017-11-09. 
  4. ^ Vyzanie. "Amidopirina". soundlike.ru. Retrieved 2017-11-09.