Andembry Drug Information

ANDEMBRY is indicated for prophylaxis to prevent attacks of hereditary angioedema (HAE) in adult and pediatric patients aged 12 years and older.

Recommended Dosage

The recommended dosage of ANDEMBRY is an initial loading dose of 400 mg (two injections of 200 mg) administered subcutaneously on the first day of treatment followed by a maintenance dosage of 200 mg administered subcutaneously every month. Missed Dose(s) If a dose of ANDEMBRY is missed, administer the dose as soon as possible.

Preparation and Administration Instructions for ANDEMBRY Prefilled Autoinjector and Prefilled Syringe with Needle Safety Device For subcutaneous use only. ANDEMBRY is intended for self-administration or administration by a caregiver. Prior to treatment initiation, train patients/caregivers on proper preparation and subcutaneous (SC) administration technique of ANDEMBRY.

Prior to administration, remove ANDEMBRY from the refrigerator and allow to sit for 30 minutes at room temperature before use. Inspect ANDEMBRY visually for particulate matter and discoloration prior to administration, whenever solution and container permit. ANDEMBRY is a slightly opalescent to clear, brownish-yellow to yellow solution.

Administer ANDEMBRY subcutaneously into the thigh or abdomen ensuring to stay 1 inch (2 cm) away from the navel. The upper arm can also be used if a caregiver administers the subcutaneous injection. Discard the used ANDEMBRY into a sharps disposal container (closed puncture-resistant container).

For detailed instructions on the preparation and administration of ANDEMBRY.

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 of ANDEMBRY reflects the exposure in a total of 164 adult and pediatric patients aged 12 years and older with hereditary angioedema (HAE) from a placebo-controlled study, VANGUARD, and an open-label clinical study. The median duration of ANDEMBRY treatment was 2.6 years.

The safety data below is based on the 6-month placebo-controlled study (VANGUARD), in which ANDEMBRY 400 mg was administered subcutaneously as a loading dose followed by 200 mg (N=39) every month in patients with HAE. Demographics of the patients in this study are summarized in Clinical Studies. The safety of ANDEMBRY was similar across all subgroups of patients, including analysis by age, sex and geographic region.

Table 1 provides the most common adverse reactions with ANDEMBRY with incidence ≥7% and more common than placebo. Injection site reactions (e.g., injection site bruising, injection site erythema, injection site hematoma, injection site pruritus, injection site urticaria) were reported in 23 (14%) patients. Laboratory Abnormalities: Prolonged Coagulation Tests (aPTT and PT) In the VANGUARD trial, the incidence of prolonged activated partial thromboplastin time (aPTT), defined as >1.4×ULN, was 3 (8%) patients in the ANDEMBRY group compared to 0 patients in the placebo group.

None of the increases in aPTT, PT and INR were associated with bleeding events.

Drug Interference with Laboratory Test Coagulation Tests ANDEMBRY can prolong activated partial thromboplastin time (aPTT) due to an interaction of garadacimab-gxii with the aPTT assay. The reagents used in the aPTT laboratory test initiate intrinsic coagulation through the activation of FXII in the contact system, therefore inhibition of plasma FXIIa by ANDEMBRY can prolong aPTT in this assay.

Pregnancy Risk Summary There are no available data on ANDEMBRY use in pregnant women to evaluate for a drug-associated risk of major birth defects, miscarriage or other adverse maternal or fetal outcomes. Monoclonal antibodies such as garadacimab-gxii are transported across the placenta during the third trimester of pregnancy; therefore, potential effects on a fetus are likely to be greater during the third trimester of pregnancy. In an embryo-fetal development study in pregnant rabbits, garadacimab-gxii produced no evidence of fetal harm at doses up to approximately 100 times the exposure achieved at the maximum recommended human dose (MRHD) of 200 mg once monthly.

In a pre- and post-natal development study in rabbits, garadacimab-gxii had no effects on survival, growth, or development of F 1 offspring at doses resulting in approximately 76 times the exposure achieved at the MRHD (see Data ). The estimated background risk of major birth defects and miscarriage for the indicated population(s) is unknown. All pregnancies have a background risk of birth defect, 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 respectively. Data Animal Data In an embryo-fetal development study in pregnant rabbits dosed by the intravenous route every 3 days during the period of organogenesis from gestation days 6 to 18, garadacimab-gxii produced no evidence of fetal harm or maternal toxicity at doses resulting in approximately 100 times the exposure achieved at the MRHD (on an AUC basis with maternal intravenous doses up to 100 mg/kg/dose). There was no evidence of maternal toxicity.

Garadacimab-gxii crossed the placenta in rabbits. With a maternal dose of 100 mg/kg garadacimab-gxii on gestation day 29, fetal plasma concentrations were 40.8% of maternal concentrations following subcutaneous administration and approximately equivalent following intravenous administration.

Pediatric Use The safety and effectiveness of ANDEMBRY for prophylaxis to prevent attacks of HAE have been established in pediatric patients aged 12 years and older. Use of ANDEMBRY for this indication is supported by evidence from a total of 6 pediatric patients aged 12 years and older enrolled in VANGUARD who received treatment with ANDEMBRY 400 mg loading dose administered subcutaneously followed by a maintenance dosage of 200 mg subcutaneously every month (n=4) or placebo (n=2). Results of the subgroup analysis for pediatric patients aged 12 years and older were consistent with study results for adult patients.

The safety and effectiveness of ANDEMBRY have not been established in pediatric patients younger than 12 years of age.