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This medication, Lidocaine Viscous 2%, carries several important safety warnings that should be carefully considered. It is vital that users and caregivers thoroughly understand these risks and consult with a healthcare professional when necessary. The following points summarize the critical safety information:

• Serious Risks in Young Children: Lidocaine Viscous 2% can cause severe and potentially fatal side effects, including seizures and cardiopulmonary arrest, in children under the age of 3. These effects are more likely if the medication is used more frequently or at a higher dose than prescribed. It is not recommended for children under 3 years old unless other safer treatments are unavailable or ineffective, and should not be used for teething pain. Always consult a healthcare provider to determine if this medication is suitable for your child. Keep the medication out of children's reach, ensure the lid is securely closed, and dispose of any unused medication safely. In case of seizures, unconsciousness, respiratory failure, or cardiac arrest, seek emergency medical help immediately.

• Overuse Concerns: Adhering to the prescribed dosage and frequency is crucial, as excessive use can lead to an accumulation of lidocaine in the body, causing serious side effects such as seizures, respiratory difficulties, low blood pressure, bradycardia, and cardiac arrest. Immediate medical attention is necessary if these symptoms occur.

• Methemoglobinemia Risk: This medication can induce methemoglobinemia, a condition where oxygen delivery by red blood cells is impaired. Individuals with low G6PD levels, a hereditary condition, are at increased risk, particularly when exposed to oxidizing agents found in household products like chlorine and hydrogen peroxide. Symptoms such as headache, fatigue, and cyanosis may appear shortly after use. Prompt medical intervention is needed to prevent severe complications like seizures, unconsciousness, or cardiac issues. The risk is heightened in individuals with a history of methemoglobinemia, those with heart or lung conditions, infants under 6 months, and those exposed to oxidizing substances.

Please consult your healthcare provider for personalized advice and to discuss any concerns about using Lidocaine Viscous 2%.

Common side effects:

• Mild nausea
• Lightheadedness
• Dizziness
• Feeling sleepy or tired
• Ringing in the ears
• Blurry or double vision
• Vomiting
• Feelings of hot, cold, or numbness
• Twitching
• Shaking
• Nervousness

Less common but important to monitor:

• Severe dizziness
• Drowsiness
• Slow or shallow breathing
• Mental changes such as confusion
• Vision changes
• Seizures
• Unusual tiredness
• Severe allergic reaction like rash
• Swelling of the face, tongue, or throat
• Trouble breathing

Serious side effects:

• Blood problems (methemoglobinemia)
• Seizures
• Loss of consciousness
• Fast heartbeat
• Difficulty breathing
• Bluish skin color
• Symptoms of excess lidocaine in the body
• Slow heartbeat
• Muscle control difficulties

Interactions with high risk of serious adverse effects and should be avoided:

• Dihydroergotamine
• Dronedarone
• Saquinavir
• Vernakalant

Interactions with moderate risk that may require dose adjustment, closer monitoring, or timing changes:

• Amifampridine
• Amiodarone
• Amprenavir
• Arbutamine
• Atazanavir
• Liposomal Bupivacaine
• Bupropion
• Cobicistat
• Dasabuvir
• Delavirdine
• Disopyramide
• Donepezil
• Encainide
• Etravirine
• Flecainide
• Fosamprenavir
• Fosphenytoin
• Hyaluronidase
• Lopinavir
• Metoprolol
• Mexiletine
• Moricizine
• Nadolol
• Phenytoin
• Procainamide
• Propafenone
• Quinidine
• Sotalol
• Succinylcholine
• Telaprevir
• Tocainide

Interactions with low risk that usually do not require a change in therapy:

• Cimetidine