Enspryng Solution for Injection

ENSPRYNG is indicated for the treatment of neuromyelitis optica spectrum disorder (NMOSD) in adult patients who are anti-aquaporin-4 (AQP4) antibody positive. ENSPRYNG is an interleukin-6 (IL-6) receptor antagonist indicated for the treatment of neuromyelitis optica spectrum disorder (NMOSD) in adult patients who are anti-aquaporin-4 (AQP4) antibody positive. ( 1 )

• Hepatitis B virus, tuberculosis, and liver transaminase screening is required before the first dose
• Prior to every use, determine if there is an active infection
• The recommended loading dosage of ENSPRYNG for the first three administrations is 120 mg by subcutaneous injection at Weeks 0, 2, and 4, followed by a maintenance dosage of 120 mg every 4 weeks
• See Full Prescribing Information for important preparation and administration instructions
• Assessments Prior to the First Dose of ENSPRYNG Hepatitis B Virus Screening Prior to initiating ENSPRYNG, perform Hepatitis B virus (HBV) screening
• ENSPRYNG is contraindicated in patients with active HBV confirmed by positive results for surface antigen [HBsAg] and anti-HBV tests
• For patients who are negative for HBsAg and positive for HB core antibody [HBcAb+] or are carriers of HBV [HBsAg+], consult liver disease experts before starting and during treatment with ENSPRYNG [see Contraindications and Warnings and Precautions ]
• Tuberculosis Screening Prior to initiating ENSPRYNG, evaluate for active tuberculosis and test for latent infection
• For patients with active tuberculosis or positive tuberculosis screening without a history of appropriate treatment, consult infectious disease experts before initiating treatment with ENSPRYNG [see Contraindications and Warnings and Precautions ]
• Liver Transaminase Screening Liver transaminases and serum bilirubin should be assessed prior to initiation of treatment with ENSPRYNG [see Warnings and Precautions ] . …

Injection: 120 mg/mL clear, and colorless to slightly yellow solution in single-dose prefilled syringe or single-dose autoinjector. Injection: 120 mg/mL in a single-dose prefilled syringe ( 3 ) Injection: 120 mg/mL in a single-dose prefilled autoinjector ( 3 )

• Safety and effectiveness
• In pediatric patients have not been established

Clinical studies of ENSPRYNG did not include sufficient numbers of patients aged 65 years and older to determine whether they respond differently from younger patients. However, population pharmacokinetic analyses in patients with NMOSD did not show that age affected the pharmacokinetics of satralizumab-mwge [see Clinical Pharmacology (12.3) ] . …

• Advise the patients to read the FDA-approved patient labeling ( Medication Guide and Instructions for Use )
• Infections Inform patients that an increased risk of infections, including serious and potentially fatal infections, has been observed in patients treated with IL-6 receptor antagonists, including ENSPRYNG
• Instruct patients to contact their healthcare provider immediately when symptoms suggesting infection (e.g., fever, chills, constant cough, or sore throat) appear during treatment [see Warning and Precautions ] . …

ENSPRYNG is contraindicated in patients with: A known hypersensitivity to satralizumab or any of the inactive ingredients [see Warnings and Precautions (5.4) ] Active Hepatitis B infection [see Warnings and Precautions (5.1) ] Active or untreated latent tuberculosis [see Warnings and Precautions (5.1) ] Known hypersensitivity to satralizumab or any of the inactive ingredients ( 4 ) Active Hepatitis B infection ( 4 ) Active or untreated latent tuberculosis ( 4 )

Infections: Delay ENSPRYNG administration in patients with an active infection until the infection is resolved. Vaccination with live or live-attenuated vaccines is not recommended during treatment. ( 5.1 ) Elevated Liver Enzymes: Monitor ALT and AST levels during treatment; interruption of ENSPRYNG may be required. ( 5.2 ) Decreased Neutrophil Counts: Monitor neutrophils during treatment. ( 5.3 ) 5.1 Infections An increased risk of infections, including serious and potentially fatal infections, has been observed in patients treated with IL-6 receptor antagonists, including ENSPRYNG. …

The following clinically significant adverse reactions are described elsewhere in the labeling: Infections [see Warnings and Precautions (5.1) ] Elevated Liver Enzymes [see Warnings and Precautions (5.2) ] Decreased Neutrophil Counts [see Warnings and Precautions (5.3) ] Hypersensitivity Reactions [see Warnings and Precautions (5.4) ] The most common adverse reactions (incidence at least 15%) are nasopharyngitis, headache, upper respiratory tract infection, gastritis, rash, arthralgia, extremity pain, fatigue, and nausea. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Genentech at 1-888-835-2555 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. …

8.1 Pregnancy Pregnancy Exposure Registry There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to ENSPRYNG during pregnancy. Healthcare providers are encouraged to register patients and pregnant women are encouraged to register themselves by calling 1-833-277-9338. Risk Summary There are no adequate data on the developmental risk associated with the use of ENSPRYNG in pregnant women. …

Refrigerate at 2°C to 8°C (36°F to 46°F) in original carton to protect from light. Do not freeze. Do not shake. ENSPRYNG can be stored out of refrigeration for a maximum of 8 days at a temperature that does not exceed 30°C (86°F). …

Take it when you remember, unless it is nearly time for the next dose. Then skip the missed one. Never take two doses at once to make up for it. Check your leaflet, as some medicines are different.