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How long after taking Lasix would you expect to urinate?

Medically reviewed by Last updated on Oct 30, 2023.

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

Official answer


The onset of increased urine production (diuresis) after taking 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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