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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 ...
Allopurinol was approved for medical use in the United States in 1966. [7] It is on the World Health Organization's List of Essential Medicines. [10] Allopurinol is available as a generic medication. [7] In 2022, it was the 39th most commonly prescribed medication in the United States, with more than 15 million prescriptions. [11] [12]
Benzbromarone is a uricosuric agent and non-competitive inhibitor of xanthine oxidase [1] used in the treatment of gout, especially when allopurinol, a first-line treatment, fails or produces intolerable adverse effects. It is structurally related to the antiarrhythmic amiodarone. [2]
It is generally recommended only for people who cannot take allopurinol. [8] [9] It is taken by mouth. [7] Common side effects include liver problems, nausea, joint pain, and a rash. [7] Serious side effects include an increased risk of death as compared with allopurinol, Stevens–Johnson syndrome, and anaphylaxis.
Type A: augmented pharmacological effects, which are dose-dependent and predictable [5]; Type A reactions, which constitute approximately 80% of adverse drug reactions, are usually a consequence of the drug's primary pharmacological effect (e.g., bleeding when using the anticoagulant warfarin) or a low therapeutic index of the drug (e.g., nausea from digoxin), and they are therefore predictable.
In pharmaceuticals, an adverse event (AE) is any unexpected or harmful medical occurrence that happens to a patient during medical treatment or a clinical trial. Unlike direct side effects , an adverse event does not necessarily mean the medication directly caused the problem.
But some research has noted rare but serious side effects of once-weekly, 2.4-milligram (mg) semaglutide injections, such as pancreatitis, acute kidney injury, gallbladder issues, and thyroid cancer.
Adverse effects, like therapeutic effects of drugs, are a function of dosage or drug levels at the target organs, so they may be avoided or decreased by means of careful and precise pharmacokinetics, the change of drug levels in the organism in function of time after administration. Adverse effects may also be caused by drug interaction. This ...