Recommended Dosage of Xylocaine (Lidocaine) Viscous for Mouth Sores
For adults and children over 12 years, apply Xylocaine viscous to the affected area no more than 3 to 4 times daily. 1
Proper Application and Administration
Lidocaine viscous is an effective topical anesthetic for managing pain associated with oral ulcers and mouth sores. When using this medication, follow these guidelines:
- Apply directly to the affected area in the mouth
- Wash hands with soap and water after application 1
- Do not exceed the recommended frequency (3-4 times daily) to avoid toxicity
- For children under 12 years, consult a doctor before use 1
Dosage Considerations and Safety
The FDA-approved dosing for lidocaine viscous is straightforward but requires careful adherence to prevent adverse effects:
- Each application should cover only the affected area
- Excessive use can lead to toxicity, as documented in case reports where consumption exceeding 240 ml per day resulted in toxic serum concentrations (6.7 μg/ml) 2
- Signs of toxicity may include neurological symptoms such as lightheadedness, slurred speech, tinnitus, and in severe cases, seizures or cardiac arrhythmias 3
Special Populations and Precautions
Children
- Children under 12 years require physician guidance for appropriate dosing 1
- Research shows that 2% viscous lidocaine was not superior to placebo for improving oral intake in children with painful infectious mouth ulcers 4
High-Risk Patients
- Use with caution in patients with:
- Cardiac disease
- Electrolyte disorders
- Seizure disorders
- Renal or hepatic impairment 3
Alternative Management Approaches
For comprehensive management of oral ulcers, consider these additional approaches:
- Good oral hygiene using soft toothbrush and mild non-foaming toothpaste
- Rinsing with saline solution 4-6 times daily
- Using alcohol-free mouthwash 5
- Avoiding spicy, acidic, and rough foods that may exacerbate pain 5
Important Warnings
- Do not use lidocaine viscous concurrently with other local anesthetic interventions
- If ulcers persist beyond 2 weeks despite treatment, further investigation is required to rule out serious conditions such as malignancy 5
- Stability studies indicate that lidocaine preparations maintain potency for up to 90 days when stored properly 6
Remember that while lidocaine viscous provides temporary relief of pain, it does not treat the underlying cause of oral ulcers. For persistent or severe cases, seek professional medical evaluation.