Sodium bicarbonate

(Mfr: AB)(Amt: 4%, 0.05 to 0.6 mL)

Bupivacaine HCl

(Mfr: AST, WI)(Amt: 0.25, 0.5^a, 0.75%^a/20 mL)

Remarks:

Precipitate forms in 1 to 2 min up to 2 hr at lowest amount of bicarbonate

Ref:

¹⁷²⁴