Fentanyl citrate (buccal); 100 microgram tablet: buccal, 4; 100 microgram tablet: buccal, 28; 200 microgram tablet: buccal, 4; 200 microgram tablet: buccal, 28; 400 microgram tablet: buccal, 4; 400 microgram tablet: buccal, 28; 600 microgram tablet: buccal, 4; 600 microgram tablet: buccal, 28; 800 microgram tablet: buccal, 4; 800 microgram tablet: buccal, 28; Fentora®