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In page Management of Parkinson's disease:

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In response to potentially toxic amphetamine metabolites caused by selegiline, another promising treatment is in MAO B propargyl amine inhibitor rasagiline (N-propargyl-1-R-aminoindan, Azilect((R))). The oral bioavailability of rasagiline is 35%, it reaches T(max) after 0.5–1.0 hours and its half-life is 1.5–3.5 hours. Rasagiline undergoes extensive hepatic metabolism primarily by cytochrome P450 type 1A2 (CYP1A2). Rasagiline is initiated at 1-mg once-daily dose as monotherapy in early PD patients and at 0.5–1.0 mg once-daily as adjunctive to levodopa in advanced PD patients.[1]