SUCCINYLCHOLINE CHLORIDE INJECTION USP Bioniche Neuromuscular Blocking Agent   Availability And Storage: Each mL of sterile solution contains: succinylcholine chloride (anhydrous base) 20 mg equivalent to dihydrate 22 mg. Nonmedicinal ingredients: hydrochloric acid (to adjust pH) and sodium chloride (for isotonicity). Ampuls of 5 mL, boxes of 10. Multiple dose vials of 10 and 20 mL (also contains methylparaben and propylparaben), trays of 10. Refrigerate (2 to 8°C) to prevent a loss of potency.