Biological half-life 12 hours CAS Number 60-80-0 DrugBank DB01435 CAS ID 60-80-0 | Synonyms analgesine, antipyrine PubChem CID 2206 Molar mass 188.2258 g/mol | |
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ATC code N02BB01 (WHO) S02DA03 (WHO) | ||
Phenazone (INN and BAN; also known as phenazon, antipyrine (USAN), or analgesine) is an analgesic, a non-steroidal anti-inflammatory drug and an antipyretic. It was first synthesized by Ludwig Knorr in 1887. Phenazone is synthesized by condensation of phenylhydrazine and ethyl acetoacetate under basic conditions and methylation of the resulting intermediate compound 1-phenyl-3-methylpyrazolone with dimethyl sulfate or methyl iodide. It crystallizes in needles which melt at 156 °C. Potassium permanganate oxidizes it to pyridazine tetracarboxylic acid. Phenazone has an elimination half life of about 12 hours. Indication: Used to relieve pain and fever. Antipyrine is often used in testing the effects of other drugs or diseases on drug-metabolizing enzymes in the liver.
Adverse effects
Possible adverse effects include: