Attruby

1 INDICATIONS AND USAGE ATTRUBY is indicated for the treatment of the cardiomyopathy of wild-type or variant transthyretin-mediated amyloidosis (ATTR-CM) in adults to reduce cardiovascular death and cardiovascular-related hospitalization. ATTRUBY is a transthyretin stabilizer indicated for the treatment of the cardiomyopathy of wild-type or variant transthyretin-mediated amyloidosis (ATTR-CM) in adults to reduce cardiovascular death and cardiovascular-related hospitalization. ( 1 , 2.1 )

2 DOSAGE AND ADMINISTRATION The recommended dosage of ATTRUBY is 712 mg orally twice daily. ( 2.1 ) 2.1 Recommended Dosage The recommended dosage of ATTRUBY is 712 mg orally twice daily (with or without food). Swallow tablets whole; do not cut, crush, or chew.

4 CONTRAINDICATIONS None. None. ( 4 ) To report SUSPECTED ADVERSE REACTIONS, contact BridgeBio Pharma Inc. at 1-844-550-2246 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch .

7 DRUG INTERACTIONS UDP-glucuronosyltransferases (UGT) Inducers and Strong CYP3A Inducers Acoramidis is metabolized by UGT enzyme-mediated glucuronidation. Concomitant use of UGT inducers can potentially decrease acoramidis exposure. While acoramidis is not metabolized by CYP3A, strong CYP3A inducers can also induce UGT enzymes. Avoid concomitant use of ATTRUBY with UGT inducers and strong CYP3A inducers. Sensitive Cytochrome P450 2C9 (CYP2C9) substrates Acoramidis inhibits CYP2C9 and may result in an increase in CYP2C9 substrate concentrations when these drugs are co administered. Consider more frequent monitoring of patients for evidence of increased exposure (for example, signs of exposure related toxicity) when ATTRUBY is co administered with sensitive CYP2C9 substrates.

8.1 Pregnancy Risk Summary Available data with acoramidis use in pregnant women are insufficient to establish a drug associated risk of major birth defects, miscarriage or other adverse maternal or fetal outcomes. In animal reproductive studies in rats and rabbits, no embryofetal abnormalities were observed at exposures up to 34 times and 13 times the clinical exposure at the maximum recommended human dose, respectively ( see Data ). The background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defects, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Report pregnancies to the BridgeBio reporting line at 1-844-550-2246. Data Animal Data In pregnant rats, oral administration of acoramidis (0, 50, 350, and 1,000 mg/kg/day) throughout organogenesis did not result in any adverse effects on embryofetal development at up to 1,000 mg/kg/day, approximately 34 times the clinical exposure at the maximum recommended human dose (MRHD) based on AUC. In pregnant rabbits, oral administration of acoramidis (0, 25, 75, and 200 mg/kg/day) throughout organogenesis resulted in increased pre-implantation loss at 200 mg/kg/day, a dose that caused maternal toxicity (26% reduced body weight gain). No embryofetal abnormalities were observed at 200 mg/kg/day, approximately 13 times the clinical exposure at the MRHD based on AUC. In a pre- and postnatal developmental toxicity study, pregnant rats received oral administration of acoramidis at doses of 0, 50, 350, or 1,000 mg/kg/day throughout pregnancy and lactation (Gestation Day 6 to Lactation Day 20). Maternal death, body weight reduction, and decreased number of females with live born pups (due to increase in resorbed litters) were observed at 1,000 mg/kg/day, approximately 43 times the clinical exposure at the MRHD based on AUC. Decreased body weight gain from the neonatal period to weaning and learning deficits were observed in the offspring of dams given 1,000 mg/kg/day. No adverse effects on pre- and postnatal development were observed at 350 mg/kg/day, approximately 18 times the clinical exposure at the MRHD based on AUC.

6 ADVERSE REACTIONS 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. The safety data reflect the exposure of 421 participants with ATTR-CM to ATTRUBY 712 mg (administered as two 356 mg tablets) administered orally twice daily in a randomized, double-blind, placebo-controlled trial of 30 months fixed treatment duration. The median duration of exposure to ATTRUBY in the safety population was 29 months. There was a higher frequency of gastrointestinal (GI) adverse reactions such as diarrhea 11.6% versus 7.6% and upper abdominal pain 5.5% versus 1.4% in the ATTRUBY versus placebo group, respectively. The majority of these GI adverse reactions were categorized as mild and resolved without drug discontinuation. A similar proportion of ATTRUBY-treated and placebo-treated participants discontinued study drug because of an adverse event (9.3% and 8.5%, respectively). Laboratory Tests Increase in Serum Creatinine and Decrease in eGFR Initiation of ATTRUBY causes an increase in serum creatinine and decrease in eGFR which generally occurs within 4 weeks of starting therapy and stabilizes. In a trial of adults with ATTR-CM, a mean increase in serum creatinine of 0.2 and 0.0 mg/dL and a mean decrease in eGFR of 8.2 and 0.7 mL/min/1.73 m 2 was observed in the ATTRUBY and placebo groups, respectively, at Day 28. The changes in serum creatinine and eGFR were reversible after treatment discontinuation.