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During the test
The CYP450 is a simple blood test. Blood is drawn from a vein in your arm and sent to a laboratory for testing. You may feel a slight prick when the needle is inserted. You won't need to fast or undergo any special preparations prior to the test. You don't even have to change into a gown.
After the test
After the blood test, which should take just a few minutes, you can resume your normal activities. The blood draw itself carries virtually no risk, though you may have slight swelling or redness at the puncture site.
