Inform your doctor if you are on any medications, have any allergies or underlying medical conditions before your Treponemal Antibodies (Fta-Abs) Indirect Immunofluorescence Assay Blood Serum. Your doctor will give specific instructions depending on your condition on how to prepare for Treponemal Antibodies (Fta-Abs) Indirect Immunofluorescence Assay Blood Serum.