Fentanyl Sublingual Spray in Treating Patients With Breakthrough Cancer Pain

Inclusion Criteria: * Male or female, ≥ 18 years of age. * Diagnosis of cancer. * Opioid-tolerant. Subjects who were opioid tolerant were those taking ≥ 60 mg of oral morphine/day, at least 25 μg of transdermal fentanyl/hour, at least 30 mg of oxycodone daily, at least 8 mg of oral hydromorphone daily or an equianalgesic dose of another opioid for a week or longer for cancer-related pain. * Experienced persistent pain related to the cancer or its treatment of moderate or lesser intensity in the 24 hours prior to assessment by a verbal rating scale at the Screening Visit. * Over the previous 7 days, subject experienced, on average, 1 to 4 breakthrough cancer pain episodes per day usually at least partially controlled by supplemental medication of at least 5 mg immediate-release morphine or an equivalent short-acting opioid (eg, oxycodone, hydrocodone, or codeine with acetaminophen). * Able to evaluate and record pain relief, assess medication performance at set times after dosing, record AEs, record each use of the study drug or supplemental medication in an electronic diary (a caregiver may have provided the subject the medication, help with the mechanics of handling the electronic diary but was not permitted to record any information in the electronic diary). * Able and willing to give informed consent. * Women of childbearing potential were to have a) a negative serum pregnancy test, b) not be breastfeeding and c) agree to practice a reliable form of contraception. Exclus…