For Intravenous Infusion HIGH ALERT MEDICATION. Each mL contains fentanyl citrate equivalent to 10 mcg (0.01 mg) fentanyl base, 9 mg sodium chloride, 0.74 mg sodium citrate dihydrate, and 0.67 mg citric acid anhydrous in Water for Injection. pH adjusted with sodium hydroxide and/or hydrochloric acid if needed.