REMIBRUTINIB: 21 Adverse Event Reports & Safety Profile

RHAPSIDO (remibrutinib) is a kinase inhibitor. Its empirical formula (remibrutinib) is C 27 H 27 F 2 N 5 O 3 . The chemical name for remibrutinib is N-(3-{6-Amino-5-[2-(N-methylprop-2-enamido)ethoxy]pyrimidin-4-yl}-5-fluoro-2-methylphenyl)-4-cyclopropyl-2-fluorobenzamide. Its molecular weight is approximately 507.54 g/mol. The chemical structure of remibrutinib is: Remibrutinib is white to pale yellow powder, and it is practically insoluble in water. RHAPSIDO is supplied as film-coated tablets for oral administration, with each film-coated tablet containing 25 mg of remibrutinib. The tablet core inactive ingredients are copovidone, croscarmellose sodium, mannitol, microcrystalline cellulose, sodium lauryl sulfate, and sodium stearyl fumarate. The tablet coating inactive ingredients are polyethylene glycol 4000, polyvinyl alcohol, red iron oxide (E172), talc, titanium dioxide (E171), and yellow iron oxide (E172). chemical structure of remibrutinib

AND USAGE RHAPSIDO ® is indicated for the treatment of chronic spontaneous urticaria (CSU) in adult patients who remain symptomatic despite H1 antihistamine treatment. Limitations of Use: RHAPSIDO is not indicated for other forms of urticaria. RHAPSIDO ® is a kinase inhibitor indicated for the treatment of chronic spontaneous urticaria (CSU) in adult patients who remain symptomatic despite H1 antihistamine treatment. ( 1 ) Limitations of Use: Not indicated for other forms of urticaria. ( 1 )

AND ADMINISTRATION Recommended dosage is 25 mg orally twice daily with or without food. ( 2.1 ) Swallow tablets whole. Do not split, crush, or chew RHAPSIDO. ( 2.1 ) Interrupt RHAPSIDO for 3 to 7 days pre- and post-surgery. ( 2.2 )

2.1 Recommended Dosage The recommended dosage is 25 mg taken orally twice daily with or without food. Swallow RHAPSIDO tablet whole with water. Do not split, crush, or chew RHAPSIDO.

Missed

Dose(s) If a dose or doses of RHAPSIDO is missed, skip the missed dose, and take the next dose at its regularly scheduled time. Do not take an extra dose(s) of RHAPSIDO to make up for a missed dose(s).

2.2 Temporary Interruption of RHAPSIDO for Surgery Interrupt treatment with RHAPSIDO for 3 to 7 days pre- and post-surgery depending upon the type of surgery and the risk of bleeding <span class="opacity-50 text-xs">[see Warnings and Precautions (5.1), Adverse Reactions (6.1) and Drug Interactions (7.2)]</span> .

None. None. ( 4 )

REACTIONS The most common adverse reactions (incidence ≥3%) were nasopharyngitis, bleeding, headache, nausea and abdominal pain. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Novartis Pharmaceuticals Corporation at 1-888-669-6682 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 drug reaction (ADR) 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 RHAPSIDO was based on a pooled safety population from two identical clinical trials of 52 weeks duration, REMIX-1 and REMIX-2 <span class="opacity-50 text-xs">[see Clinical Studies (14)]</span> . The pooled safety population consisted of 912 adult patients with CSU who remain symptomatic despite H1 antihistamine treatment and who received RHAPSIDO 25 mg orally twice daily (N=606) or placebo (N=306) for 24 weeks during the double-blind, controlled treatment period of the trial. Adverse reactions that occurred at an incidence greater than or equal to 3% and more common than the placebo group from the pooled safety population (REMIX-1 and REMIX-2) during the 24-week blinded, placebo-controlled treatment period are shown in Table 1.

Table

1 Adverse Reactions with RHAPSIDO with Incidence ≥3% and More Common than Placebo in Adult Patients with CSU (REMIX-1 and REMIX-2) a includes acute sinusitis, chronic sinusitis, nasopharyngitis, pharyngitis, pharyngitis streptococcal, rhinitis, rhinitis allergic, and upper respiratory tract infection b includes conjunctival bleeding, contusion, ecchymosis, epistaxis, gingival bleeding, hematoma, hematuria, hemorrhagic ovarian cyst, intermenstrual bleeding, petechiae, purpura, and urinary occult blood c includes headache and migraine d includes abdominal discomfort, abdominal distention, abdominal pain and abdominal pain upper Adverse Reaction RHAPSIDO (N = 606) n (%) Placebo (N = 306) n (%) Nasopharyngitis a 67 (11%) 27 (9%) Bleeding b 55 (9%) 6 (2%) Headache c 41 (7%) 19 (6%)

Nausea

18 (3%) 5 (2%)

Abdominal

Pain d 18 (3%) 6 (2%)

Specific Adverse Reactions

Bleeding In the pooled safety population (REMIX-1 and REMIX-2), bleeding occurred in 9% of patients treated with RHAPSIDO compared to 2% in the placebo group during the 24-week controlled treatment period [see Dosage and Administration (2.2), Warnings and Precautions (5.1), and Drug Interactions (7.2)] . Petechiae (4%) and contusion (2%) were the most commonly reported reactions in patients treated with RHAPSIDO. No severe bleeding reactions occurred. No association between bleeding reactions and low platelet counts was observed. In patients treated with RHAPSIDO, 0.5% experienced bleeding reactions that led to RHAPSIDO discontinuation, while none of these reactions occurred in the placebo group. Similar safety findings were observed through Week 52 [see Clinical Studies (14)] .

AND PRECAUTIONS Risk of Bleeding: Monitor for signs and symptoms of bleeding. Interrupt treatment with RHAPSIDO if bleeding is observed or pre- and post-surgery. Concomitant use of antithrombotic agents with RHAPSIDO may further increase risk of bleeding. ( 5.1 )

Live Attenuated

Vaccines: Avoid live or live-attenuated vaccines in patients receiving RHAPSIDO. ( 5.2 )

5.1 Risk of Bleeding In placebo-controlled studies in patients with CSU, mucocutaneous-related bleeding occurred in 9% of patients who received RHAPSIDO <span class="opacity-50 text-xs">[see Adverse Reactions (6.1)]</span> . Interrupt treatment with RHAPSIDO if bleeding is observed and resume if the benefit is expected to outweigh the risk. Interrupt treatment with RHAPSIDO for 3 to 7 days pre- and post-surgery or invasive procedures <span class="opacity-50 text-xs">[see Dosage and Administration (2.2)]</span> . Use of antithrombotic agents concomitantly with RHAPSIDO may further increase the risk of bleeding <span class="opacity-50 text-xs">[see Drug Interactions (7.2)]</span> . Consider the benefits and risks of antithrombotic agents when used concomitantly with RHAPSIDO. Monitor for signs and symptoms of bleeding.

5.2 Live Attenuated Vaccines No data are available on the effects of live or live-attenuated vaccines in patients receiving RHAPSIDO. The use of live and live-attenuated vaccines should be avoided in patients receiving RHAPSIDO.

INTERACTIONS Strong or Moderate CYP3A4 Inhibitors: Avoid concomitant use with RHAPSIDO. ( 7.1 ) Strong or Moderate CYP3A4 Inducers: Avoid concomitant use with RHAPSIDO. ( 7.1 ) P-gp Substrates: Exposure increases where minimal concentration changes may lead to serious adverse reactions: Monitor more frequently for adverse reactions when used concomitantly with RHAPSIDO. ( 7.2 )

Antithrombotic

Agents: Consider the risks and benefits of concomitant use of antithrombotic agents with RHAPSIDO. ( 7.2 )

7.1 Effect of Other Drugs on RHAPSIDO Strong or Moderate CYP3A4 Inhibitors Avoid use of RHAPSIDO with strong or moderate CYP3A4 inhibitors. Remibrutinib is a CYP3A4 substrate. Concomitant use with a strong or moderate CYP3A4 inhibitor increases remibrutinib exposure <span class="opacity-50 text-xs">[see Clinical Pharmacology (12.3)]</span> , which may increase the risk of RHAPSIDO adverse reactions. Strong or Moderate CYP3A4 Inducers Avoid use of RHAPSIDO with strong or moderate CYP3A4 inducers. Remibrutinib is a CYP3A4 substrate. Concomitant use with a strong or moderate CYP3A4 inducer decreases remibrutinib exposure <span class="opacity-50 text-xs">[see Clinical Pharmacology (12.3)]</span> , which may decrease the efficacy of RHAPSIDO.

7.2 Effect of RHAPSIDO on Other Drugs P-gp Substrates Monitor more frequently for adverse reactions when using RHAPSIDO with P-glycoprotein (P-gp) substrates where minimal concentration changes may lead to serious adverse reactions (e.g., digoxin). Remibrutinib is a P-gp inhibitor. Remibrutinib increases exposure of P-gp substrates, which may increase the risk of adverse reactions related to P-gp substrates <span class="opacity-50 text-xs">[see Clinical Pharmacology (12.3)]</span> .

Antithrombotic Agents

Consider the risks and benefits of concomitant administration of antithrombotic agents with RHAPSIDO [see Dosage and Administration (2.2), Warnings and Precautions (5.1), and Adverse Reactions (6.1)] . No data are available on concomitant use of RHAPSIDO with anticoagulants. The concomitant use of RHAPSIDO and anticoagulants was not allowed in clinical studies. Use of the antiplatelet agents, acetyl salicylic acid at doses up to 100 mg daily or clopidogrel up to 75 mg daily, was allowed in the RHAPSIDO clinical studies.