Usage and dosage of benzocaine

Usage and dosage of benzocaine
1 otology with 20% suspension, adult dose can be used 4 to 5 drops, drip into the external auditory canal, repeated 1-2 hours on demand, usually after the ear drops must be blocked with cotton to avoid outflow; children are generally not used. 2 ointment 5%, 20%, adult for acne, apply the affected area, morning, evening and after the stool; children do not. 3 aerosol liquid 20%, for skin or mucous membrane parts can be administered repeatedly as needed; children under 3 years old do not need. 4 gel 20%, mainly used in the oral cavity of the gums to stop toothache, the gel for children is 5%. 5 spray liquid 10-20%, sprayed on the affected area, repeated as needed, children with caution.
Description
1 poor water solubility, acting on local application, absorption is very small; 2 children with caution, a large number, there is a risk of methemoglobinemia, 3 external use can be cross-allergic reaction with tetracaine external tincture; 4 limited external use.

the dosage of benzocaine for Precautions
1. Limited to external use.
2. Poor water solubility, acting on local application, absorption is minimal.
3. Children with caution in large doses, there is a risk of causative hemoglobinemia.