Prostate-Specific Antigen (PSA): What Affects The Test
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What Affects the Test
Factors that can interfere with your test or the accuracy of the results include:
- Recent sexual activity (ejaculation) or a cystoscopy.
- Recent use of a tube (catheter) to drain urine.
- Recent urinary tract infection (UTI) or prostatitis.
- Large doses of medicines, such as cyclophosphamide (Cytoxan, Neosar), diethylstilbestrol, and methotrexate for cancer treatment.
- The medicine finasteride, such as Proscar or Avodart, which is used to prevent further enlargement of the prostate gland in men with BPH.
| Last updated: | May 15, 2007 |
|---|---|
| Author: | Ralph Poore |
| Reviewed By: | Martin Gabica, MD - Family Medicine, Christopher G. Wood, MD, FACS - Urology/Oncology |
| Editors: | Susan Van Houten, RN, BSN, MBA, Tracy Landauer |
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