Which anesthetic corresponds to a 1% solution with max dose 4-5 mg/kg and onset 2-5 minutes, duration 50-120 minutes?

• A. Lidocaine 1%
• B. Lidocaine with epinephrine 1% + 1:200,000 epi
• C. Procaine 1%
• D. Mepivacaine 1%

Answer: (A)

This question tests matching the local anesthetic’s profile to the given numbers. Lidocaine at 1% without a vasoconstrictor fits all four traits: a 1% solution provides 10 mg per mL; the safe maximum without epinephrine is about 4–5 mg/kg (roughly 0.4–0.5 mL/kg), onset is typically 2–5 minutes, and the duration is about 50–120 minutes. Adding epinephrine would raise the maximum permissible dose and usually extend the duration beyond that 50–120 minute window, while the other agents either have different onset times or longer durations. So, lidocaine 1% without epi best matches the stated profile.