6.1Clinical
Trial s Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates 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. Over 1700 patients with IBS-D have been treated with 75 or 100 mg of VIBERZI twice daily in controlled trials. Exposures from placebo-controlled clinical trials in adult patients with IBS-D included 1391 exposed for 3 months, 1001 exposed for 6 months and 488 exposed for one year.
Demographic characteristics were comparable between the treatment groups [see Clinical Studies ( 14 )] . Data described below represent pooled data compared to placebo across the randomized trials. Pancreatitis Cases of pancreatitis, not associated with sphincter of Oddi spasm, were reported in 2/807 (0.2%) of patients receiving 75 mg and 3/1032 (0.3%) of patients receiving 100 mg VIBERZI twice daily in clinical trials.
Of these 5 cases, 3 were associated with excessive alcohol intake, one was associated with biliary sludge, and in one case the patient discontinued VIBERZI 2 weeks prior to the onset of symptoms. All pancreatic events resolved with lipase normalization upon discontinuation of VIBERZI, with 80% (4/5) resolving within 1 week of treatment discontinuation. The case of sphincter of Oddi spasm-induced pancreatitis resolved within 24 hours of discontinuation.
Sp h incter of Oddi Spasm In clinical trials, sphincter of Oddi spasm occurred in 0.2% (2/807) of patients receiving 75 mg and 0.8% (8/1032) of patients receiving 100 mg VIBERZI twice daily. Among patients receiving 75 mg, 1/807 (0.1%) patient experienced a sphincter of Oddi spasm presenting with abdominal pain but with lipase elevation less than 3 times the upper limit of normal (ULN) and 1/ 807 (0.1%) patient experienced a sphincter of Oddi spasm manifested as elevated hepatic enzymes associated with abdominal pain Among patients receiving 100 mg, 1/1032 (0.1%) patient experienced a sphincter of Oddi spasm manifested as pancreatitis and 7/1032 (0.7%) patients experienced sphincter of Oddi spasm manifested as elevated hepatic enzymes associated with abdominal pain Of those patients who experienced a sphincter of Oddi spasm, 80% (8/10) reported their first onset of symptoms within the first week of treatment.
The case of sphincter of Oddi spasm-induced pancreatitis occurred within minutes of taking the first dose of VIBERZI. No cases of sphincter of Oddi spasm occurred greater than 1 month after treatment onset. All events resolved upon discontinuation of VIBERZI, with symptoms typically improved by the following day. Common Adverse Reactions Table 1 provides the incidence of common adverse reactions reported in > 2% of IBS-D patients in either VIBERZI treatment group and at an incidence greater than in the placebo group.
Table 1: Common* Adverse Reactions in the Placebo-Controlled Studies in IBS-D Patients Adverse Reactions VIBERZI 100 mg twice daily (N= 1032) % VIBERZI 75 mg twice daily (N=807) % Placebo (N=975) % Constipation 8 7 2 Nausea 7 8 5 Abdominal Pain** 7 6 4 Upper Respiratory Tract Infection 5 3 4 Vomiting 4 4 1 Nasopharyngitis 3 4 3 Abdominal Distention 3 3 2 Bronchitis 3 3 2 Dizziness 3 3 2 Flatulence 3 3 2 Rash*** 3 3 2 Increased ALT 3 2 1 Fatigue 2 3 2 Viral gastroenteritis 1 3 2 * Reported in > 2% of VIBERZI-treated patients at either dose and at an incidence greater than in placebo-treated patients ** " Abdominal Pain" term includes: abdominal pain, abdominal pain lower, and abdominal pain upper *** " Rash" term includes: dermatitis, dermatitis allergic, rash, rash erythematous, rash generalized, rash maculo-papular, rash papular, rash pruritic, urticaria, and idiopathic urticaria Constipation was the most commonly reported adverse reaction in VIBERZI-treated patients in these trials.
Approximately 50% of constipation events occurred within the first 2 weeks of treatment while the majority occurred within the first 3 months of therapy. Rates of severe constipation were less than 1% in patients receiving 75 mg and 100 mg VIBERZI. Similar rates of constipation occurred between the active and placebo arms beyond 3 months of treatment. Adverse Reactions Leading to Discontinuation Eight percent of patients treated with 75 mg, 8% of patients treated with 100 mg VIBERZI and 4% of patients treated with placebo discontinued prematurely due to adverse reactions.
In the VIBERZI treatment groups, the most common reasons for discontinuation due to adverse reactions were constipation (1% for 75 mg and 2% for 100 mg) and abdominal pain (1% for both 75 mg and 100 mg). In comparison, less than 1% of patients in the placebo group withdrew due to constipation or abdominal pain. Less Common Adverse Reactions Adverse reactions that were reported in ≤ 2% of VIBERZI-treated patients are listed below by body system.
Gastrointestinal : gastroesophageal reflux disease General Disorders and administration site conditions : feeling drunk Investigations: increased AST Nervous system : sedation, somnolence Psychiatric disorders : euphoric mood Respiratory : asthma, bronchospasm, respiratory failure, wheezing