Lidocaine Side Effects

Possible side effects of lidocaine transdermal patch are listed below. Tell your doctor if these side effects are severe or do not go away in a few days.

• Redness, swelling, burning, or discomfort in the skin under the patch

Some of the adverse reactions of lidocaine are more serious. Call your doctor right away or seek emergency medical attention if you develop:

• Skin rash, hives, itching, bruising, blisters (signs of an allergic reaction)
• Difficulty breathing or swallowing
• Shortness of breath
• Swelling of the eyes, face, lips, tongue, throat, hands, feet, lower legs or ankles
• Hoarseness
• Fast heartbeat
• Fast breathing
• Unusual thirst
• Nausea
• Vomiting
• Weakness
• Dizziness
• Fainting
• Lightheadedness
• Confusion
• Pale skin, gray-blue skin discoloration
• Fatigue

The above list may not include all the potential side effects of lidocaine. Contact your healthcare provider if your side effects are unusual or severe or they do not get better over time. You can also report unusual side effects to the Food and Drug Administration at 1-800-FDA-1088.

Lidocaine Overdose: In case of an overdose of lidocaine, call your doctor immediately. You can also call the national poison control center at 1-800-222-1222. Overdose symptoms may include nervousness, confusion, lightheadedness, dizziness, drowsiness, slow heartbeat, blurred vision, double vision, ringing in the ears, vomiting, shaking or twitching, sensations of hot, cold, or numbness, seizures, and loss of consciousness.

Source: FDA