Autoantibodies: disease markers
Oct. 25, 2023
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Dalfampridine is an extended-release formulation of fampridine (4-aminopyridine). 4-aminopyridine has a restricted use as an extremely effective bird poison sold under the brand name Avitrol, which is highly toxic to all mammals, including humans, if dosages are exceeded. Compounded forms of the active agent of sustained-release fampridine have been used in clinical practice for many years and shown to improve walking ability in patients with multiple sclerosis. Clinical trials have now been completed that demonstrate effectiveness of the drug with statistical significance and clinically meaningful end points (14). In 2010, the FDA approved dalfampridine (Ampyra™), which is the first oral therapy for multiple sclerosis. Approval of dalfampridine will enable patients to obtain a consistent exact dosage in a guaranteed time-released formula and avoids the risk of getting an uncertain preparation from a compounding pharmacy with possible adverse effects. A life-threatening accidental overdose of fampridine due to a compounding pharmacy error has been reported (27).
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