You should not receive  Xylocaine-MPF if you have severe heart block, or a heart rhythm disorder called Stokes-Adams syndrome or Wolff-Parkinson-White Syndrome.
Before taking this medicine
You should not receive this medicine if you are allergic to Xylocaine-MPF or any other type of numbing medicine, or if you have:
severe heart block;
a heart rhythm disorder called Stokes-Adams syndrome (sudden slow heart beats that can cause you to faint); or
a heart rhythm disorder called Wolff-Parkinson-White Syndrome (sudden fast heartbeats that can cause you to faint or become easily tired).
Tell your doctor if you have ever had:
an allergy to corn products;
liver disease;
kidney disease;
heart disease (unless you are being treated with Xylocaine-MPF for a heart condition);
coronary artery disease, circulation problems; or
malignant hyperthermia.
Tell your doctor if you are pregnant or breastfeeding.
