Literally hundreds of medications can change or alter the
results of a urinalysis (UA). Many change the physical characteristics, others change
the chemical characteristics. A very partial list would
be:
1. Deferoxamine turns the urine
red.
2. Nitrofurantoin turns the urine
brown.
3. Many vitamins change the odor of
urine.
4. Diazoxide decreases the
pH.
5. Tolmetin will cause a false positive for
proteinuria.
6. Bacitracin causes a true proteinuria
(protein in the urine).
7. Tetracycline causes a false
positive for glycosuria (glucose in the urine).
8.
Methicillin causes a leukocytosis (white blood cells in the
urine).
9. Sulfonamides can cause a hematuria (blood in the
urine).
10. Isoniazid causes ketonuria (ketone bodies in
the urine).
11. Furosemide causes casts in the
urine.
12. Theophyline causes crystals in the
urine.
Many more examples exist. This is a good example of
why health care providers should familiarize themselves with commonly prescribed
medications and the potential changes they can have on laboratory data. An abnormality
noted on lab work may not be a true
abnormality.
Diagnostics/Springhouse/p. 356,
357
No comments:
Post a Comment