Exploratory Bioavailability of Fentanyl Sublingual Spray Under Fasting Conditions

Single-Dose, Open-Label, Two-Period, Two-Treatment, Two-Sequence Crossover Exploratory Bioavailability Study of Subsys® (Fentanyl Sublingual Spray), 400 mcg, and Fentanyl Citrate Injection 2 mL x 0.05 mg/mL (Total Dose 100 mcg) Under Fasted Conditions

The objective of this study is to compare the rate of absorption and bioavailability of fentanyl sublingual spray 400 mcg to fentanyl citrate 100 mcg by intramuscular injection.

Inclusion Criteria:

• Meets protocol-specified criteria for qualification and contraception
• Good access to veins on both sides
• Willing and able to remain confined in the study unit for the entire duration of each treatment period and comply with restrictions related food, drink and medications
• Voluntarily consents to participate and provides written informed consent prior to any protocol-specific procedures

Exclusion Criteria:

• Intolerance to venipuncture or injections
• Presence or history of oral disease, irritation or piercings
• Allergy or adverse response to fentanyl, naltrexone, or related drugs
• Tattoos, scarring, or other skin abnormality at planned injection sites
• History or current use of over-the-counter medications, dietary supplements, or drugs (including nicotine and alcohol) outside protocol-specified parameters
• Signs, symptoms or history of any condition that, per protocol or in the opinion of the investigator, might compromise: 1) the safety or well-being of the participant or study staff; 2) the safety or well-being of the participant's offspring (such as through pregnancy or breast-feeding); 3) the analysis of results