For pretreatment with amitriptyline before scald, mice were injected intraperitoneally with 10 mg/kg amitriptyline (Sigma-Aldrich, St. Louis, MO) twice daily for 2 days as previously described (23 (link)). The last dose was given 1 h before injury. Mice were weighed 24 h following scald or sham treatment. Elavil (amitriptyline HCI) dosage for outpatients ranges from 75 mg to 150 mg a day while hospitalized patients may require 100 mg to 300 mg a day.