Lupus Titer Blood Test: No Fasting Required

The lupus titer (typically ANA by immunofluorescence, with reflex titer and pattern) does not require fasting. You may eat, drink, and take medications normally before the blood draw.

Notes:

• ANA is a screening test; positive result (≥1:80 or 1:160 depending on lab) prompts further specific autoantibody testing (anti-dsDNA, anti-Smith, anti-Ro/SSA, anti-La/SSB, anti-RNP, antiphospholipid antibodies).
• False positives occur in infections, medications, aging, other autoimmune diseases.
• Clinical correlation (symptoms, exam, other labs) is essential for SLE diagnosis (SLICC or ACR/EULAR criteria).

If other tests are ordered simultaneously (lipids, glucose), follow their fasting requirements.