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The Rumack–Matthew nomogram, also known as the acetaminophen nomogram, is an acetaminophen toxicity nomogram. It plots serum concentration of acetaminophen against the time since ingestion, in order to predict possible liver toxicity and allow a clinician to decide whether to proceed with N-Acetylcysteine (NAC) treatment.
Paracetamol poisoning, also known as acetaminophen poisoning, is caused by excessive use of the medication paracetamol (acetaminophen). [2] Most people have few or non-specific symptoms in the first 24 hours following overdose. These symptoms include feeling tired, abdominal pain, or nausea.
NAPQI, also known as NAPBQI or N-acetyl-p-benzoquinone imine, is a toxic byproduct produced during the xenobiotic metabolism of the analgesic paracetamol (acetaminophen). [1] It is normally produced only in small amounts, and then almost immediately detoxified in the liver.
The solid form of acetylcysteine is stable under normal conditions, but it can undergo oxidation if exposed to air or moisture over time, leading to the formation of its dimeric form, diacetylcysteine, which can have different properties. [60] Acetylcysteine is highly hygroscopic, i.e., it absorbs moisture if exposed to open air. [59]
Six types of toxicity data are included in the file: Primary irritation; Mutagenic effects; Reproductive effects; Tumorigenic effects; Acute toxicity; Other multiple dose toxicity; Specific numeric toxicity values such as LD 50, LC 50, TDLo, and TCLo are noted as well as species studied and the route of administration used. For all data the ...
The active ingredient of its original flagship product is paracetamol (known in the United States, Canada, and various other countries as acetaminophen), an analgesic and antipyretic. Like the words paracetamol and acetaminophen, the brand name Tylenol is derived from a chemical name for the compound, N-acetyl-para-aminophenol (APAP). [1]
Each year, paracetamol overdose is linked to about 400 deaths and 42,000 hospitalizations. [ 22 ] In January 2011, the FDA asked manufacturers of prescription combination products that contain paracetamol to limit the amount of paracetamol to no more than 325 mg in each tablet or capsule within three years.
As of 2004, paracetamol overdose resulted in more calls to poison control centers in the U.S. than overdose of any other pharmacological substance. [109] According to the FDA, in the United States, "56,000 emergency room visits, 26,000 hospitalizations, and 458 deaths per year [were] related to acetaminophen-associated overdoses during the 1990s.