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Allopurinol has been marketed in the United States since 19 August 1966, when it was first approved by FDA under the trade name Zyloprim. [40] Allopurinol was marketed at the time by Burroughs Wellcome. Allopurinol is a generic drug sold under a variety of brand names, including Allohexal, Allosig, Milurit, Alloril, Progout, Ürikoliz, Zyloprim ...
Allopurinol hypersensitivity syndrome (AHS) typically occurs in persons with preexisting kidney failure. [3]: 119 Weeks to months after allopurinol is begun, the patient develops a morbilliform eruption [3]: 119 or, less commonly, develops one of the far more serious and potentially lethal severe cutaneous adverse reactions viz., the DRESS syndrome, Stevens Johnson syndrome, or toxic epidermal ...
The median effective dose is the dose that produces a quantal effect (all or nothing) in 50% of the population that takes it (median referring to the 50% population base). [6] It is also sometimes abbreviated as the ED 50, meaning "effective dose for 50% of the population". The ED50 is commonly used as a measure of the reasonable expectancy of ...
the dose at which toxicity occurs in 50% of cases. LD Lethal Dose the dose at which death occurs in 50% of cases. [6]: 73 [7] [8] TI Therapeutic Index a quantitative measurement of the relative safety of a drug by comparison of the amount of a therapeutic agent that causes toxicity to the amount that causes the therapeutic effect [1]
Levels that cannot be brought below 6.0 mg/dL while attacks continue indicates refractory gout. [68] While historically it is not recommended to start allopurinol during an acute attack of gout, this practice appears acceptable. [69] Allopurinol blocks uric acid production, and is the most commonly used agent. [20]
An equianalgesic chart is a conversion chart that lists equivalent doses of analgesics (drugs used to relieve pain). Equianalgesic charts are used for calculation of an equivalent dose (a dose which would offer an equal amount of analgesia) between different analgesics. [1]
For the drugs administered by oral and dermal route, the units of threshold dose are mg/kg body-weight/day (dose of the drug in mg per body weight in kg per day) or ppm (parts per million), while the threshold dose of drugs by inhalation delivery has the unit of mg/L 6h/day (amount of drug in mg in 1L of air, for 6 hours per day). [8]
Febuxostat is used to treat chronic gout and hyperuricemia. [12] Febuxostat is typically recommended only for people who cannot tolerate allopurinol. [13] National Institute for Health and Clinical Excellence concluded that febuxostat is more effective than standard doses of allopurinol, but not more effective than higher doses of allopurinol.