DOSES / DURATION OF ACTION OF LOCAL ANESTHETICS

MAXIMUM DOSES OF LA:

• 7 mg/ kg of body weight  maximum if LA is mixed with Adrenaline
• 10 mg / kg of body weight maximum if LA is given alone without Adrenaline

• 0.5 %  LA mean 5 mg/ml and its should be given < 60 ml
• 1 % LA means 10 mg / ml and it should be given < 30 ml-50 ml
• 2 % LA means 20 mg .ml and it should be given < 15 ml -25 %

DURATION OF ACTION OF LA:

• Lidocaine alone:  acts for 1 hour
• Lidocaine + Adrenaline : 1-4 hours