How to prepare for the test:
Do not smoke for one hour before test
Do not drink alcohol within four hours of test
Do not eat a large meal within two hours of test
Please wear loose clothing
Do not perform vigorous exercise within 30 minutes of test
If you are on puffer medications, you may be asked to not take them for a few hours before spirometry. Ask your doctor (or the center performing the test) beforehand if this applies to you.