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warnings and cautions
5 WARNINGS AND PRECAUTIONS An increase in QTc interval prolongation can occur at dosages higher than the recommended dosage. Additional doses or doses of ORLADEYO higher than the recommended dosage are not recommended. ( 5.1 ) 5.1 Risk of QTc Interval Prolongation with Higher-Than-Recommended Dosages ORLADEYO should not be used for treatment of acute attacks of HAE. Additional doses or doses of ORLADEYO higher than the recommended dosage are not recommended. An increase in QTc interval was observed in adults at dosages higher than 150 mg once daily and was concentration dependent [see Dosage and Administration (2) and Clinical Pharmacology (12.2) ] .
6 ADVERSE REACTIONS The following clinically significant adverse reaction is described elsewhere in the labeling: QTc Interval Prolongation [see Warnings and Precautions (5.1) ] . Most common adverse reactions (≥10%) are abdominal pain, vomiting, diarrhea, back pain, and gastroesophageal reflux disease. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact BioCryst Pharmaceuticals, Inc. at 1-833-633-2279 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials 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. Adverse Reactions in Adult and Pediatric Patients 12 Years of Age and Older The safety of ORLADEYO is primarily based on 24-week (Part 1) data from a 3-part, double-blind, parallel-group, placebo-controlled trial (Trial 1) in 120 patients with Type I or II HAE who were randomized and dosed with either ORLADEYO 110 mg, 150 mg, or placebo, once daily with food. After Week 24, patients who continued in the study received active treatment through 48 weeks. In Trial 1, a total of 81 patients aged 12 years and older with HAE received at least one dose of ORLADEYO in Part 1. Overall, 66% of patients were female and 93% of patients were White with a mean age of 41.6 years. The proportion of patients who discontinued study drug prematurely due to adverse reactions was 7% and 3% for patients treated with ORLADEYO 110 mg and 150 mg, respectively, and 3% for placebo-treated patients. No deaths occurred in the trial. The safety profile of ORLADEYO was generally similar across all subgroups of patients, including analysis by age, sex, and geographic region. Table 2 shows adverse reactions occurring in ≥10% of adult and pediatric patients aged 12 years and older in any ORLADEYO treatment group that also occurred at a higher rate than in the placebo treatment group in Trial 1. Table 2: Adverse Reactions Observed in ≥10% of Adult and Pediatric Patients Aged 12 Years and Older with HAE in Any ORLADEYO Treatment Group (Trial 1) Adverse Reaction Placebo (N=39) ORLADEYO 110 mg (N=41) 150 mg (N=40) Total (N=81) n (%) n (%) n (%) n (%) Abdominal Pain includes Abdominal pain, Abdominal discomfort, Abdominal pain upper, and Abdominal tenderness 4 (10) 4 (10) 9 (23) 13 (16) Vomiting 1 (3) 4 (10) 6 (15) 10 (12) Diarrhea includes Diarrhea and Frequent bowel movements 0 4 (10) 6 (15) 10 (12) Back Pain 1 (3) 1 (2) 4 (10) 5 (6) Gastroesophageal Reflux Disease 0 4 (10) 2 (5) 6 (7) Gastrointestinal adverse reactions, including abdominal pain, vomiting, and diarrhea occurred more frequently in patients receiving ORLADEYO 150 mg versus ORLADEYO 110 mg or placebo. These adverse reactions generally occurred early after initiation of treatment with ORLADEYO, became less frequent with time, and typically self-resolved. No patients in the ORLADEYO 150 mg dose group and 1 patient in the ORLADEYO 110 mg dose group discontinued treatment due to a gastrointestinal adverse reaction. Less Common Adverse Reactions Other adverse reactions that occurred in Part 1 of Trial 1 with an incidence between 5% to <10% and at a higher incidence in ORLADEYO-treated patients compared to placebo-treated patients included headache (9% versus 5%), fatigue (6% versus 3%), and flatulence (6% versus 3%). A maculopapular drug rash was reported in less than 1% of patients treated with ORLADEYO. The rash resolved, including in patients who continued dosing. Safety data are also available from 227 patients enrolled in an ongoing, open-label, long-term safety study (Trial 2) who received ORLADEYO 110 mg (N=100) or 150 mg (N=127) once daily with food and are consistent with the 24-week controlled safety data from Trial 1 (Part 1). Laboratory Abnormalities Transaminase Elevations In Part 1 of Trial 1, one patient treated with ORLADEYO 150 mg discontinued treatment due to asymptomatic elevated transaminases (ALT >8x the upper limit of normal [ULN] and AST >3x ULN). Total bilirubin was normal. No patient receiving ORLADEYO 110 mg or placebo developed transaminase levels >3x ULN. In addition to this patient, 2 ORLADEYO-treated patients developed laboratory-related hepatic adverse reactions compared to 1 placebo-treated patient. No patient reported serious adverse reactions of elevated transaminases. Adverse Reactions in Pediatric Patients 2 to Less than 12 Years of Age The safety of ORLADEYO was evaluated in 29 pediatric patients aged 2 to <12 years with HAE in a multicenter, single-arm, open-label safety and pharmacokinetic study (Trial 3). Patients received ORLADEYO based on patient's body weight for at least 12 weeks, with 17 patients completing 48 weeks of treatment. No new safety signals were observed in these patients. 6.2 Postmarketing Experience The following adverse reactions have been identified during postapproval use of ORLADEYO. 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. Gastrointestinal Disorders: nausea