Temporarily relieving pain caused by cold sores/fever blisters. It may also be used at the first sign of tingling, itching, or burning to treat cold sores before they develop.
Bactine liquid is an anesthetic. It works by preventing nerves from transmitting painful impulses to the brain.
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Examples include Bactine and Zilactin L
Redness or swelling at the application site.
Seek medical attention right away if any of these SEVERE side effects occur:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); choking; confusion; dizziness or lightheadedness; fast breathing; fast, slow, or irregular heartbeat; fever; mood or mental changes; ringing in the ears or hearing changes; seizures; shortness of breath; swelling of the throat; vision changes.
Usual Adult Dose for Pain Lidocaine 0.5% spray: Apply a thin film to affected area up to 3 to 4 times daily as needed 3% lotion or cream: Apply a thin film to affected area 2 to 3 times daily as needed 3% gel: Apply a thin film to affected area 2 to 3 times daily as needed Maximum dose: A single application should not exceed 4 pumps; do not exceed 12 pumps in 24 hours 4% cream, gel, solution: Apply a thin film to affected area 3 to 4 times daily as needed 5% ointment: Apply topically for adequate control of symptoms Maximum dose: 5 gm per single application (approximately 6 inches of ointment squeezed from the tube); 20 gm total in any day