Table 2.

Most Frequently Observed Waste Amounts for Fentanyl and Hydromorphone.

Drug	N	Waste amount	Percentage of total wastes (%)
Fentanyl (50 µg/mL) 2 mL vial	143	50 µg	49.83
Fentanyl (50 µg/mL) 2 mL vial	132	75 µg	45.99
Hydromorphone (1 mg/mL) 1 mL vial	239	0.5 mg	62.89
Hydromorphone (1 mg/mL) 1 mL vial	68	0.8 mg	17.89