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Definition of Polyuria

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Polyuria: The excessive passage of urine (at least 2.5 liters per day for an adult) resulting in profuse urination and urinary frequency (the need to urinate frequently).

Polyuria is a classic sign of diabetes mellitus that is under poor control or is not yet under treatment. Polyuria occurs in some other conditions such as:

Certain drugs such as the mood stabilizer lithium (Lithobid, Eskalith) and the antibiotic demeclocycline (Declomycin) can also lead to polyuria.

Reviewed on 12/11/2018

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