[header] How to do a stress test [title] Talk to your doctor about the medications you are on, particularly the heart medications. [step] You may need to stop taking certain prescriptions 2 or 3 days before the test. [title] Avoid eating and drinking 4 to 5 hours before your stress test. 
[step] If you have anything in your stomach, the procedure can cause nausea. Most medical professionals do say you can drink water before a testing.