Homovanillic Acid (HVA), per creatinine (for random/spot urine collection)

Instructions before sampling

Patient Preparation:

1. Patient should abstain from the following at least 3 days prior to and during urine specimen collection:

 

    1.1. Where medically possible, drugs such as drugs containing phenotiazines which may potentially interfere with the testing.

2. If the patient cannot be completely removed from a drug regime, test result should be interpreted with appropriate clinical judgement based on expected physiology response to these drugs.