How you prepare

Bone marrow exams are often performed on an outpatient basis. Special preparation usually isn't needed.

If you'll be receiving a sedative during the bone marrow exam, your doctor may ask you to stop eating and drinking for a period of time before the procedure. You'll also need to make arrangements for someone to drive you home afterward.

In addition, you may want to:

• Tell your doctor about medications and supplements you take. Certain medications and supplements may increase your risk of bleeding after a bone marrow aspiration and biopsy.
• Tell your doctor if you're nervous about your procedure. Discuss your worries about the exam with your doctor. In some cases, your doctor may give you a sedative medication before your exam, in addition to a numbing agent (local anesthesia) at the site where the needle is inserted.