Things To Avoid Prior To 24 Hour Urine Collection

URINE TEST

PATIENT INSTRUCTIONS

TICK AS APPLICABLE

•

Avoid all seafood for 72 hours prior to collection.

ARSENIC EXPOSURE

•

Seafood consumption two to three days prior to specimen collection can markedly elevate levels of total arsenic in urine.

CYSTINE QUANTITATIVE

•

The patient is taking penicillamine.

•

Avoid bananas, avocados, plums, eggplant, tomatoes, lantain, pineapples and walnuts.

5-HIAA

•

Do not take any paracetamol or drugs containing paracetamol 72 hours prior to collection.

HEAVY METALS

•

Avoid seafood and red wine 72 hours prior to collection.

•

Avoid aspirin, disulfiram, reserpine and pyridoxine, if possible, at least

HOMOVANILLIC ACID

48 hours prior to collection of the specimen.

•

Levodopa should be avoided for two weeks before collection.

•

No caffeine before or during collection.

METANEPHRINES

•

Monoamine oxidase inhibitors should be discontinued at least one week prior to beginning collection.

•

Avoid stress.

•

Many drugs (reserpine and α-methyldopa, levodopa, monoamine oxidase inhibitors, and sympathomimetic amines) may interfere and should be discontinued two weeks prior to specimen collection.

•

Nose drops, sinus and cough medicines, bronchodilators and appetite

CATECHOLAMINE

suppressants, α2-agonists, calcium channel blockers, converting enzyme inhibitors, bromocriptine, phenothiazine, tricyclic antidepressants, α- and β-blockers, and labetalol may interfere.

•

Mandelamine^® interferes, but thiazides do not.

•

Caffeine products should be avoided before and during collection.

•

The patient should not be subjected to hypoglycaemia or exertion.

•

Avoid salicylates, caffeine, phenothiazine and anti-hypertension agents.

VANILLYLMANDELIC

•

Coffee, tea, chocolate, fruit (especially bananas and any foods containing

ACID

vanilla) for 72 hours prior to collection.