Metanephrine (total) - urine

Collect 24h urine, eventually 10 ml may be sent to the lab.

Note: Be sure to include collection amount and time. Keep urine cool and protected from light during the collection period. If possible, stop taking medications about 1 week in advance; From 3 days before acceptance, avoid the following foods: cocoa, coffee, tea, chocolate, nuts, citrus fruits, products containing vanilla. No nicotine indulgence. Avoid mental and physical stress. If possible, do not use: nitroglycerin, alpha-methyldopa, MAO inhibitors, tricyclic antidepressants, L-dopa, no acute administration of calcium antagonists, theophylline, nasal drops, respiratory relaxants, appetite suppressants, cough drops.