Which patient preparation is recommended for catecholamine testing?

• A. Overnight fasting and no smoking and coffee
• B. No special preparation is needed
• C. Heavy exercise prior to collection
• D. Alcohol avoidance only

Answer: (A)

Catecholamine levels are highly sensitive to recent sympathetic stimulation, so minimizing acute triggers before collection is key. An overnight fast reduces post-meal metabolic effects, while avoiding smoking and caffeinated beverages like coffee prevents nicotine- and caffeine-induced surges in adrenaline and noradrenaline. Together, these steps lower the risk of artificially elevated results and improve test accuracy. In contrast, no special preparation leaves the patient susceptible to stress-related spikes, heavy exercise before collection directly elevates catecholamines, and alcohol avoidance alone doesn’t address the major stimulants that can alter levels.