If possible take patient off Antidepressants and L-Dopa, for one week prior to collection. Otherwise supply complete list of medications.

Exclude walnuts, avocados, bananas, pineapples, plums and tomatoes from diet 48 hours prior to and during collection.

A creatinine excretion test is performed on 24 hour urine collections in order to confirm the adequacy of the collection.

In timed urine collections other than 24 hours, (+/- 2 hours), the 24 hour excretion cannot be calculated due to different day time and night time excretion patterns of various analytes.

Please note the time and date of the start and of the end of collection.

Add ons for this test cannot be performed.