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How long after taking Lasix pill would you expect to urinate?

Is it within hours? Or will it take all day?

Medically reviewed by Last updated on Nov 9, 2020.

Official Answer


The onset of increased urine production (diuresis) after taking of Lasix orally is within 1 hour. The peak diuretic effect occurs within the first or second hour, which then reduces over the next 6 to 8 hours.

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