Jakafi

— THERAPEUTIC CATEGORIES —
  • Leukemias, lymphomas, and other hematologic cancers
  • Miscellaneous immune disorders

Jakafi Generic Name & Formulations

General Description

Ruxolitinib 5mg, 10mg, 15mg, 20mg, 25mg; tabs.

Pharmacological Class

Janus kinase (JAK) inhibitor.

How Supplied

Tabs—60

Manufacturer

Generic Availability

NO

Jakafi Indications

Indications

Intermediate or high-risk myelofibrosis (MF), including primary MF, post-polycythemia vera MF and post-essential thrombocythemia MF. Polycythemia vera (PV) in patients with an inadequate response to, or intolerant of, hydroxyurea.

Jakafi Dosage and Administration

Adult

Doses may be given by NG tube if unable to swallow tabs. MF: Platelets >200×109/L: initially 20mg twice daily. Platelets 100–200×109/L: initially 15mg twice daily. Platelets 50–<100×109/L: initially 5mg twice daily. May increase doses by 5mg twice daily to a max of 25mg twice daily; do not increase during the first 4 weeks of therapy and not more frequently than every 2 weeks. Discontinue treatment after 6 months if no reduction in spleen size or symptom improvement. Interrupt treatment if platelets <50×109/L or ANC <0.5×109/L. May restart after recovery of platelets or ANC (see full labeling for max allowable restarting doses). Consider dose reductions if platelets decrease but remain ≥50×109/L (see full labeling). Dose modifications for patients starting treatment with platelets 50–<100×109/L: see full labeling. PV: initially 10mg twice daily. May increase doses by 5mg twice daily to a max of 25mg twice daily; do not increase during the first 4 weeks of therapy and not more frequently than every 2 weeks. Consider dose reductions for Hgb and/or platelet decreases (see full labeling). Interrupt treatment if Hgb <8g/dL, platelets <50×109/L, or ANC <1.0×109/L. May restart after recovery of hematologic parameters (see full labeling for max allowable restarting doses). Concomitant strong CYP3A4 inhibitors or fluconazole ≤200mg (MF): initially 10mg twice daily if platelets ≥100×109/L; if platelets 50–<100×109/L: initially 5mg once daily; (PV): initially 5mg twice daily. Other reductions, hepatic or renal impairment, ESRD: see full labeling.

Children

Not established.

Jakafi Contraindications

Not Applicable

Jakafi Boxed Warnings

Not Applicable

Jakafi Warnings/Precautions

Warnings/Precautions

Monitor for thrombocytopenia, anemia, neutropenia; manage by reducing dose, interrupt, or transfusion if occur. Obtain CBC and platelets before initiating therapy, every 2–4 weeks until doses are stabilized, and then as clinically indicated. Risk of serious bacterial, mycobacterial, fungal, and viral infections; evaluate and treat if occur; delay starting until active infections resolved. May exacerbate MF following treatment interruption or discontinuation. Risk of non-melanoma skin cancer; perform periodic skin exams. Increases in lipid parameters including total-C, LDL, triglycerides; assess 8–12 weeks after starting and treat if hyperlipidemia develops. Increased risk of MACE, thrombosis, lymphoma, and other malignancies; monitor. Consider the risks/benefits esp. in patients with known malignancy, cardiovascular risk factors, or smokers. Avoid abrupt cessation. Renal or hepatic impairment: reduce doses (see full labeling). Pregnancy. Nursing mothers: not recommended (during and for 2 weeks after final dose).

Jakafi Pharmacokinetics

Metabolism

CYP3A4, CYP2C9 (minor). ~97% protein binding.

Elimination

Renal (74%), fecal (22%). Half-life: ~3 hours.

Jakafi Interactions

Interactions

Avoid concomitant fluconazole doses >200mg daily. Potentiated by strong CYP3A4 inhibitors (eg, ketoconazole) and moderate CYP3A4 inhibitors (eg, erythromycin); consider reducing Jakafi dose (see full labeling). Concomitant other CYP3A4 inhibitors (in GVHD): monitor CBCs more frequently for toxicity and adjust Jakafi dose if needed. May be antagonized by strong CYP3A4 inducers (eg, rifampin); monitor and adjust dose based on response.

Jakafi Adverse Reactions

Adverse Reactions

Thrombocytopenia, anemia, neutropenia, bruising, dizziness, headache, infections, edema; herpes zoster, tuberculosis (monitor promptly and test for latent infection), progressive multifocal leukoencephalopathy (discontinue if suspected), hepatitis B.

Jakafi Clinical Trials

See Literature

Jakafi Note

Not Applicable

Jakafi Patient Counseling

See Literature

Jakafi Generic Name & Formulations

General Description

Ruxolitinib 5mg, 10mg, 15mg, 20mg, 25mg; tabs.

Pharmacological Class

Janus kinase (JAK) inhibitor.

How Supplied

Tabs—60

Manufacturer

Generic Availability

NO

Jakafi Indications

Indications

Steroid-refractory acute graft-vs-host disease (GVHD). Chronic GVHD after failure of 1 or 2 lines of systemic therapy.

Jakafi Dosage and Administration

Adults and Children

<12yrs: not established. Doses may be given by NG tube if unable to swallow tabs. ≥12yrs: Acute GVHD: initially 5mg twice daily; consider increasing to 10mg twice daily after ≥3 days if ANC and platelets are not decreased by ≥50% relative to the first day of dosing. Chronic GVHD: initially 10mg twice daily. Both: consider tapering after 6 months of treatment in patients with response who have discontinued therapeutic doses of corticosteroids. Taper by 1 dose level approx. every 8 weeks. Concomitant fluconazole ≤200mg: 5mg once daily (for acute GVHD); 5mg twice daily (for chronic GVHD). Other reductions, hepatic or renal impairment, ESRD: see full labeling.

Jakafi Contraindications

Not Applicable

Jakafi Boxed Warnings

Not Applicable

Jakafi Warnings/Precautions

Warnings/Precautions

Monitor for thrombocytopenia, anemia, neutropenia; manage by reducing dose, interrupt, or transfusion if occur. Obtain CBC and platelets before initiating therapy, every 2–4 weeks until doses are stabilized, and then as clinically indicated. Risk of serious bacterial, mycobacterial, fungal, and viral infections; evaluate and treat if occur; delay starting until active infections resolved. May exacerbate MF following treatment interruption or discontinuation. Risk of non-melanoma skin cancer; perform periodic skin exams. Increases in lipid parameters including total-C, LDL, triglycerides; assess 8–12 weeks after starting and treat if hyperlipidemia develops. Increased risk of MACE, thrombosis, lymphoma, and other malignancies; monitor. Consider the risks/benefits esp. in patients with known malignancy, cardiovascular risk factors, or smokers. Avoid abrupt cessation. Renal or hepatic impairment: reduce doses (see full labeling). Pregnancy. Nursing mothers: not recommended (during and for 2 weeks after final dose).

Jakafi Pharmacokinetics

Metabolism

CYP3A4, CYP2C9 (minor). ~97% protein binding.

Elimination

Renal (74%), fecal (22%). Half-life: ~3 hours.

Jakafi Interactions

Interactions

Avoid concomitant fluconazole doses >200mg daily. Potentiated by strong CYP3A4 inhibitors (eg, ketoconazole) and moderate CYP3A4 inhibitors (eg, erythromycin); consider reducing Jakafi dose (see full labeling). Concomitant other CYP3A4 inhibitors (in GVHD): monitor CBCs more frequently for toxicity and adjust Jakafi dose if needed. May be antagonized by strong CYP3A4 inducers (eg, rifampin); monitor and adjust dose based on response.

Jakafi Adverse Reactions

Adverse Reactions

Thrombocytopenia, anemia, neutropenia, bruising, dizziness, headache, infections, edema; herpes zoster, tuberculosis (monitor promptly and test for latent infection), progressive multifocal leukoencephalopathy (discontinue if suspected), hepatitis B.

Jakafi Clinical Trials

See Literature

Jakafi Note

Not Applicable

Jakafi Patient Counseling

See Literature