Reasons you may not be able to
have the test or why the results may not be helpful include:
- Taking certain medicines. Be sure your doctor knows all of the medicines you take. Some medicines that affect test results include ones used for birth control, heart failure, seizures, and rheumatoid arthritis.
- Having cancer
- Receiving a
blood transfusion in the past 6
- Getting vaccinations (immunizations),
especially vaccinations with repeat (booster) doses, in the past 6
- Using alcohol or illegal drugs.
- Having a
radioactive scan in the past 3 days.