Before using lidocaine, tell your doctor or pharmacist if you are allergic to it; or to other amide type anesthetics (such as bupivacaine, prilocaine); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: broken skin/infection in the area where lidocaine is to be used, heart disease, liver disease, a certain blood disorder (methemoglobinemia).

If you are going to have an MRI test, tell testing personnel that you are using this product. Some brands of this medication may contain metals that can cause serious burns during an MRI and should not be used before MRI imaging. Ask your doctor or pharmacist for questions about your particular brand.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

Children may be more sensitive to the side effects of this drug.

During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.

This medication passes into breast milk, but is unlikely to harm a nursing infant. Consult your doctor before breastfeeding.