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adverse reactions
6 ADVERSE REACTIONS The following serious adverse reactions are described, or described in greater detail, in other sections: Addiction, Abuse, and Misuse [see Warnings and Precautions ( 5.1 )] Life-Threatening Respiratory Depression [see Warnings and Precautions ( 5.2 )] Interactions with Benzodiazepines and Other CNS Depressants [see Warnings and Precautions ( 5.4 )] Neonatal Opioid Withdrawal Syndrome [see Warnings and Precautions ( 5.8 )] Opioid-Induced Hyperalgesia and Allodynia [see Warnings and Precautions ( 5.9 )] Serotonin Syndrome [see Warnings and Precautions ( 5.10 )] Adrenal Insufficiency [see Warnings and Precautions ( 5.12 )] Severe Hypotension [see Warnings and Precautions ( 5.13 )] Gastrointestinal Adverse Reactions [see Warnings and Precautions ( 5.15 )] Seizures [see Warnings and Precautions ( 5.16 )] Most common (frequency ≥5%): nausea, dizziness, somnolence, vomiting, asthenia, and headache, dyspnea, constipation, anxiety, confusion, depression, rash, and insomnia. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Teva Pharmaceuticals at 1-888-483-8279 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Studies Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The safety of Oral Transmucosal Fentanyl Citrate (OTFC) has been evaluated in 257 opioid-tolerant chronic cancer pain patients. The duration of OTFC use varied during the open-label study. Some patients were followed for over 21 months. The average duration of therapy in the open-label study was 129 days. The most serious adverse reactions associated with OTFC are respiratory depression (potentially leading to apnea or respiratory arrest), circulatory depression, hypotension, and shock. Because the clinical trials of OTFC were designed to evaluate safety and efficacy in treating breakthrough cancer pain, all patients were also taking concomitant opioids, such as sustained-release morphine or transdermal fentanyl, for their persistent cancer pain. The adverse event data presented here reflect the actual percentage of patients experiencing each adverse effect among patients who received OTFC for breakthrough cancer pain along with a concomitant opioid for persistent cancer pain. There has been no attempt to correct for concomitant use of other opioids, duration of OTFC therapy, or cancer-related symptoms. Three short-term clinical trials with similar titration schemes were conducted in 257 patients with malignancy and breakthrough cancer pain. Data are available for 254 of these patients. Table 1 lists, by dose groups, adverse reactions with an overall frequency of 1% or greater that occurred during titration. The ability to assign a dose-response relationship to these adverse reactions is limited by the titration schemes used in these studies. Adverse reactions are listed in descending order of frequency within each body system. Table 1. Percent of Patients with Specific Adverse Events Commonly Associated with Opioid Administration or of Particular Clinical Interest Which Occurred During Titration (Events in 1% or More of Patients) Dose Group Percentage of Patients Reporting Event 200- 600 mcg (n=230) 800- 1400 mcg (n=138) 1600 mcg (n=54) >1600 mcg (n=41) Any Dose Any Dose = A patient who experienced the same adverse event at multiple doses was only counted once. (n=254) Body As A Whole Asthenia 6 4 0 7 9 Headache 3 4 6 5 6 Accidental Injury 1 1 4 0 2 Digestive Nausea 14 15 11 22 23 Vomiting 7 6 6 15 12 Constipation 1 4 2 0 4 Nervous Dizziness 10 16 6 15 17 Somnolence 9 9 11 20 17 Confusion 1 6 2 0 4 Anxiety 3 0 2 0 3 Abnormal Gait 0 1 4 0 2 Dry Mouth 1 1 2 0 2 Nervousness 1 1 0 0 2 Vasodilatation 2 0 2 0 2 Hallucinations 0 1 2 2 1 Insomnia 0 1 2 0 1 Thinking Abnormal 0 1 2 0 1 Vertigo 1 0 0 0 1 Respiratory Dyspnea 2 3 6 5 4 Skin Pruritus 1 0 0 5 2 Rash 1 1 0 2 2 Sweating 1 1 2 2 2 Special Senses Abnormal Vision 1 0 2 0 2 The following adverse reactions not reflected in Table 1 occurred during titration with an overall frequency of 1% or greater and are listed in descending order of frequency within each body system. Body as a Whole: Pain, fever, abdominal pain, chills, back pain, chest pain, infection Digestive: Diarrhea, dyspepsia, flatulence Metabolic and Nutritional: Peripheral edema, dehydration Nervous: Hypesthesia, migraine Respiratory: Pharyngitis, cough increased The following reactions occurred during titration with an overall frequency of less than 1% and are listed in descending order of frequency within each body system. Body as a Whole: Bone pain Cardiovascular: Deep thrombophlebitis, hypertension, hypotension Digestive: Anorexia, eructation, fecal impaction, gum hemorrhage, mouth ulceration, oral moniliasis Hemic and Lymphatic: Anemia, leukopenia Metabolic and Nutritional: Edema, hypercalcemia, weight loss Musculoskeletal: Myalgia, pathological fracture, myasthenia Nervous: Abnormal dreams, urinary retention, agitation, amnesia, emotional lability, euphoria, incoordination, libido decreased, neuropathy, paresthesia, speech disorder Respiratory: Hemoptysis, pleural effusion, rhinitis, asthma, hiccup, pneumonia, respiratory insufficiency, sputum increased Skin and Appendages: Alopecia, exfoliative dermatitis Special Senses: Taste perversion Urogenital: Vaginal hemorrhage, dysuria, hematuria, urinary incontinence, urinary tract infection A long-term extension study was conducted in 156 patients with malignancy and breakthrough cancer pain who were treated for an average of 129 days. Data are available for 152 of these patients. Table 2 lists by dose groups, adverse reactions with an overall frequency of 1% or greater that occurred during the long-term extension study. Adverse reactions are listed in descending order of frequency within each body system. Table 2. Percent of Patients with Adverse Events Commonly Associated with Opioid Administration or of Particular Clinical Interest Which Occurred During Long Term Treatment (Events in 1% or More of Patients) Dose Group Percentage of Patients Reporting Event 200- 600 mcg (n=98) 800- 1400 mcg (n=83) 1600 mcg (n=53) >1600 mcg (n=27) Any Dose Any Dose = A patient who experienced the same adverse event at multiple doses was only counted once. (n=152) Body As A Whole Asthenia 25 30 17 15 38 Headache 12 17 13 4 20 Accidental Injury 4 6 4 7 9 Hypertonia 2 2 2 0 3 Digestive Nausea 31 36 25 26 45 Vomiting 21 28 15 7 31 Constipation 14 11 13 4 20 Intestinal Obstruction 0 2 4 0 3 Cardiovascular Hypertension 1 1 0 0 1 Nervous Dizziness 12 10 9 0 16 Anxiety 9 8 8 7 15 Somnolence 8 13 8 7 15 Confusion 2 5 13 7 10 Depression 9 4 2 7 9 Insomnia 5 1 8 4 7 Abnormal Gait 5 1 0 0 4 Dry Mouth 3 1 2 4 4 Nervousness 2 2 0 4 3 Stupor 4 1 0 0 3 Vasodilatation 1 1 4 0 3 Thinking Abnormal 2 1 0 0 2 Abnormal Dreams 1 1 0 0 1 Convulsion 0 1 2 0 1 Myoclonus 0 0 4 0 1 Tremor 0 1 2 0 1 Vertigo 0 0 4 0 1 Respiratory Dyspnea 15 16 8 7 22 Skin Rash 3 5 8 4 8 Sweating 3 2 2 0 4 Pruritus 2 0 2 0 2 Special Senses Abnormal Vision 2 2 0 0 3 Urogenital Urinary Retention 1 2 0 0 2 The following reactions not reflected in Table 2 occurred with an overall frequency of 1% or greater in the long-term extension study and are listed in descending order of frequency within each body system. Body as a Whole: Pain, fever, back pain, abdominal pain, chest pain, flu syndrome, chills, infection, abdomen enlarged, bone pain, ascites, sepsis, neck pain, viral infection, fungal infection, cachexia, cellulitis, malaise, pelvic pain Cardiovascular: Deep thrombophlebitis, palpitation, vascular disorder Digestive: Diarrhea, anorexia, dyspepsia, dysphagia, oral moniliasis, mouth ulceration, rectal disorder, stomatitis, flatulence, gastrointestinal hemorrhage, gingivitis, jaundice, periodontal abscess, eructation, glossitis, rectal hemorrhage Hemic and Lymphatic: Anemia, leukopenia, thrombocytopenia, ecchymosis, lymphadenopathy, lymphedema, pancytopenia Metabolic and Nutritional: Peripheral edema, edema, dehydration, weight loss, hyperglycemia, hypokalemia, hypercalcemia, hypomagnesemia Musculoskeletal: Myalgia, pathological fracture, joint disorder, leg cramps, arthralgia, bone disorder Nervous: Hypesthesia, paresthesia, hypokinesia, neuropathy, speech disorder, migraine Respiratory: Cough increased, pharyngitis, pneumonia, rhinitis, sinusitis, bronchitis, epistaxis, asthma, hemoptysis, sputum increased Skin and Appendages: Skin ulcer, alopecia Special Senses: Tinnitus, conjunctivitis, ear disorder, taste perversion Urogenital: Urinary tract infection, urinary incontinence, breast pain, dysuria, hematuria, scrotal edema, hydronephrosis, kidney failure, urinary urgency, urination impaired, breast neoplasm, vaginal hemorrhage, vaginitis The following reactions occurred with a frequency of less than 1% in the long-term extension study and are listed in descending order of frequency within each body system. Body as a Whole: Allergic reaction, cyst, face edema, flank pain, granuloma, bacterial infection, mucous membrane disorder, neck rigidity Cardiovascular: Angina pectoris, hemorrhage, hypotension, peripheral vascular disorder, postural hypotension, tachycardia Digestive: Cheilitis, esophagitis, fecal incontinence, gastroenteritis, gastrointestinal disorder, gum hemorrhage, hemorrhage of colon, hepatorenal syndrome, liver tenderness, tooth caries, tooth disorder Hemic and Lymphatic: Bleeding time increased Metabolic and Nutritional: Acidosis, generalized edema, hypocalcemia, hypoglycemia, hyponatremia, hypoproteinemia, thirst Musculoskeletal: Arthritis, muscle atrophy, myopathy, synovitis, tendon disorder Nervous: Acute brain syndrome, agitation, cerebral ischemia, facial paralysis, foot drop, hallucinations, hemiplegia, miosis, subdural hematoma Respiratory : Hiccup, hyperventilation, lung disorder, pneumothorax, respiratory failure, voice alteration Skin and Appendages : Herpes zoster, maculopapular rash, skin discoloration, urticaria, vesiculobullous rash Special Senses : Ear pain, eye hemorrhage, lacrimation disorder, partial permanent deafness, partial transitory deafness Urogenital: Kidney pain, nocturia, oliguria, polyuria, pyelonephritis 6.2 Postmarketing Experience The following adverse reactions have been identified during post approval use of OTFC. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Digestive: - Dental decay : Dental decay, including dental caries, tooth loss, and gum line erosion. Nervous System Disorders: - Serotonin syndrome : Cases of serotonin syndrome, a potentially life-threatening condition, have been reported during concomitant use of opioids with serotonergic drugs. - Hyperalgesia and Allodynia : Cases of hyperalgesia and allodynia have been reported with opioid therapy of any duration [see Warnings and Precautions ( 5.9 )] . Endocrine Disorders: - Adrenal insufficiency : Cases of adrenal insufficiency have been reported with opioid use, more often following greater than one month of use. - Androgen deficiency : Cases of androgen deficiency have occurred with use of opioids for an extended period of time [see Clinical Pharmacology ( 12.2 )] . Immune System Disorders: - Anaphylaxis : Anaphylaxis has been reported with ingredients contained in OTFC. General Disorders and Administration Site Conditions: - Application site reactions including irritation, pain, ulcer, and drug withdrawal syndrome. Metabolic and Nutritional Disorders: - Hypoglycemia : Cases of hypoglycemia have been reported in patients taking opioids. Most reports were in patients with at least one predisposing risk factor (e.g., diabetes). Gastrointestinal Disorders: - Opioid-induced esophageal dysfunction (OIED): Cases of OIED have been reported in patients taking opioids and may occur more frequently in patients taking higher doses of opioids, and/or in patients taking opioids longer term [see Warnings and Precautions ( 5.15 )] . Adverse Reactions from Observational Studies A prospective, observational cohort study estimated the risks of addiction, abuse, and misuse in patients initiating long-term use of Schedule II opioid analgesics between 2017 and 2021. Study participants included in one or more analyses had been enrolled in selected insurance plans or health systems for at least one year, were free of at least one outcome at baseline, completed a minimum number of follow-up assessments, and either: 1) filled multiple extended-release/long-acting opioid analgesic prescriptions during a 90-day period (n=978); or 2) filled any Schedule II opioid analgesic prescriptions covering at least 70 of 90 days (n=1,244). Those included also had no dispensing of the qualifying opioids in the previous 6 months. Over 12 months: approximately 1% to 6% of participants across the two cohorts newly met criteria for addiction, as assessed with two validated interview-based measures of moderate-to-severe opioid use disorder based on Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) criteria, and approximately 9% and 22% of participants across the two cohorts newly met criteria for prescription opioid abuse and misuse [defined in Drug Abuse and Dependence ( 9.2 )] , respectively, as measured with a validated self-reported instrument. A retrospective, observational cohort study estimated the risk of opioid-involved overdose or opioid overdose-related death in patients with new long-term use of Schedule II opioid analgesics from 2006 through 2016 (n=220,249). Included patients had been enrolled in either one of two commercial insurance programs, one managed care program, or one Medicaid program for at least 9 months. New long-term use was defined as having Schedule II opioid analgesic prescriptions covering at least 70 days’ supply over the 3 months prior to study entry and none during the preceding 6 months. Patients were excluded if they had an opioid-involved overdose in the 9 months prior to study entry. Overdose was measured using a validated medical code-based algorithm with linkage to the National Death Index database. The 5-year cumulative incidence estimates for opioid-involved overdose or opioid overdose-related death ranged from approximately 1.5% to 4% across study sites, counting only the first event during follow-up. Approximately 17% of first opioid overdoses observed over the entire study period (5-11 years, depending on the study site) were fatal. Higher baseline opioid dose was the strongest and most consistent predictor of opioid-involved overdose or opioid overdose-related death. Study exclusion criteria may have selected patients at lower risk of overdose, and substantial loss to follow-up (approximately 80%) also may have biased estimates. The risk estimates from the studies described above may not be generalizable to all patients receiving opioid analgesics, such as those with exposures shorter or longer than the duration evaluated in the studies.