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The effects of ziprasidone on steady-state lithium levels and renal clearance of lithium.

Author(s): Apseloff G, Mullet D, Wilner KD, Anziano RJ, Tensfeldt TG, Pelletier SM, Gerber N

Affiliation(s): Department of Pharmacology, Ohio State University, Columbus, OH, USA.

Publication date & source: 2000, Br J Clin Pharmacol., 49 Suppl 1:61S-64S.

Publication type: Clinical Trial; Randomized Controlled Trial

AIMS: To assess the potential of ziprasidone to alter the renal clearance and steady-state serum levels of lithium. METHODS: Healthy subjects who had stable serum lithium levels during the first 7 days of treatment with lithium 900 mg day(-1), given as two divided daily doses, were randomized to receive concomitant treatment with either ziprasidone, 40 mg day(-1), given as two divided daily doses, on days 9-11 followed by 80 mg day(-1), given as two divided daily doses on days 12-15 (n = 12), or placebo twice daily (n = 13). Ziprasidone or placebo was administered 2 h before each dose of lithium. RESULTS: Ziprasidone administration was associated with a 0.07 mmol l(-1) (13%) mean increase in steady-state serum lithium levels compared with a mean increase of 0.06 mmol l(-1) (10%) with placebo. Mean renal clearance of lithium decreased by 0.09 l h(-1) (5%) in the ziprasidone group and by 0.14 l h(-1) (9%) in the placebo group. None of these differences between the two groups was statistically or clinically significant. CONCLUSIONS: Ziprasidone does not alter steady-state serum lithium concentrations or renal clearance of lithium.

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