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Diagnosing Erectile Dysfunction (cont.)

Laboratory Testing

Laboratory testing is needed for some men. Tests such as these may be performed:

  • Your hormonal status for testosterone (the male hormone) is evaluated, particularly if one of your symptoms is low sexual desire (low libido).

    • Blood tests for testosterone should ideally be taken early in the morning because that is when levels are usually at their highest.

    • Blood may also be tested for other hormones that can affect sexual function (eg, luteinizing hormone, prolactin).

  • Your blood may be checked for glucose (sugar), cholesterol, thyroid function, triglycerides, and prostate specific antigen (PSA).

  • A urinalysis looking for blood cells, protein, and glucose (sugar) may also be done.

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