Turalio Drug Information

is indicated for the treatment of adult patients with symptomatic tenosynovial giant cell tumor (TGCT) associated with severe morbidity or functional limitations and not amenable to improvement with surgery. TURALIO is a kinase inhibitor indicated for the treatment of adult patients with symptomatic tenosynovial giant cell tumor (TGCT) associated with severe morbidity or functional limitations and not amenable to improvement with surgery.

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 TURALIO 250 mg orally twice daily administered with a low-fat meal has been established based on adequate and well-controlled studies of TURALIO 400 mg orally twice daily administered on an empty stomach and additional pharmacokinetic data that indicate there is no clinically significant difference in the relative exposure between the two dosages. The safety of TURALIO was evaluated in ENLIVEN . ENLIVEN excluded patients with ALT, AST, or total bilirubin >1.5 × ULN; and known active or chronic infection with hepatitis B or C virus, or human immunodeficiency virus.

Patients received TURALIO without food at a dose of 400 mg in the morning and 600 mg in the evening orally for 2 weeks followed by 400 mg orally twice daily until disease progression or unacceptable toxicity. Seventy-nine percent of patients received TURALIO for 6 months or longer and 66% for greater than one year. The median age of TURALIO-treated patients was 44 years (range: 22-75), 57% were females, and 85% were White.

Serious adverse reactions were reported in 13% of patients who received TURALIO. Most frequent (occurring in >1 patient) serious adverse reactions included abnormal liver tests (3.3%) and hepatotoxicity (3.3%). Permanent discontinuation due to an adverse reaction occurred in 13% of patients who received TURALIO. Most frequent adverse reactions (occurring in >1 patient) requiring permanent discontinuation included increased ALT (4.9%), increased AST (4.9%) and hepatotoxicity (3.3%). Dose reductions or interruptions occurred in 38% of patients who received TURALIO. Most frequent adverse reactions (occurring in >1 patient) requiring a dosage reduction or interruption were increased ALT (13%), increased AST (13%), nausea (8%), increased ALP (7%), vomiting (4.9%), increased bilirubin (3.3%), increased GGT (3.3%), dizziness (3.3%), and abdominal pain (3.3%). The most common (>20%) adverse reactions, including laboratory abnormalities, in patients who received TURALIO were: increased lactate dehydrogenase (LDH), increased AST, hair color changes, fatigue, increased ALT, decreased neutrophils, increased cholesterol, increased ALP, decreased lymphocytes, eye edema, decreased hemoglobin, rash, dysgeusia, and decreased phosphate. Tables 4, 5, and 6 summarize the adverse reactions and laboratory abnormalities in ENLIVEN during the randomized phase (Week 25). Table 4: Adverse Reactions (≥10% All Grades or >2% Grade ≥ 3) in Patients Receiving TURALIO with a Difference Between Arms of >5% Compared to Placebo Through Week 25 in ENLIVEN TURALIO N=61 Placebo N=59 Adverse Reaction All Grades (%) Grade ≥ 3 (%) All Grades (%) Grade ≥ 3 (%) Skin and subcutaneous tissue Hair color changes 67 0 3.4 0 Rash Rash includes rash, maculo-papular rash, rash pruritic, urticaria, erythema, dermatitis acneiform, dermatitis allergic. 28 1.6 7 0 Pruritus Pruritis includes pruritus, pruritus generalized. 18 0 3.4 0 General Fatigue Fatigue includes fatigue, asthenia, malaise. 64 0 41 0 Peripheral edema Peripheral edema includes face edema, localized edema, edema peripheral, peripheral swelling. 20 0 7 0 Eye Eye edema Eye edema includes periorbital edema, eye edema, eyelid edema, papilledema. 30 1.6 5 0 Nervous system Dysgeusia Dysgeusia includes dysgeusia, ageusia. 26 0 1.7 0 Neuropathy Neuropathy includes neuropathy peripheral, paresthesia, hypoesthesia, burning sensation. 10 0 5 0 Gastrointestinal Vomiting 20 1.6 5 0 Constipation 12 0 5 0 Metabolism and nutrition Decreased appetite 16 0 10 0 Vascular Hypertension 15 4.9 10 0 Table 5: Hepatic Laboratory Abnormalities (≥10% All Grades or >2% Grade ≥ 3) Worsening from Baseline in Patients Receiving TURALIO with a Difference Between Arms of >5% Compared to Placebo Through Week 25 in ENLIVEN TURALIO Each test incidence is based on the number of patients who had both a baseline and at least one on-study measurement TURALIO (n=61) and placebo (n=59). Placebo Laboratory Abnormality Graded per NCI CTCAE v 4.03 Grade 1 (%) Grade 2 (%) Grade ≥ 3 (%) Grade 1 (%) Grade 2 (%) Grade ≥ 3 (%) ALT = alanine aminotransferase; AST = aspartate aminotransferase; ALP = alkaline phosphatase Liver Tests Increased AST 61 15 12 15 0 0 Increased ALT 31 13 20 22 0 0 Increased ALP 31 3.3 4.9 1.7 0 0 Increased bilirubin 3.3 3.3 3.3 0 0 0 Table 6: Other Laboratory Abnormalities Worsening from Baseline (≥10% All Grades or >2% of Grade ≥ 3) in Patients Receiving TURALIO with a Difference Between Arms of >5% Compared to Placebo Through Week 25 in ENLIVEN TURALIO Each test incidence is based on the number of patients who had both a baseline and at least one on-study measurement TURALIO (n = 61) and placebo (n = 58-59). Placebo Laboratory Abnormality Graded per NCI CTCAE v 4.03 except for LDH All Grades (%) Grade ≥3 (%) All Grades (%) Grade ≥3 (%) LDH=Lactate Dehydrogenase Chemistry Increased LDH LDH: Grade 1 >ULN to ≤2.5 × ULN; Grade 2 >2.5 to ≤5 × ULN; Grade 3 >5 to ≤20 × ULN; Grade 4 >20 × ULN 92 0 5 0 Increased cholesterol 44 4.9 25 0 Decreased phosphate 25 3.3 5 0 Hematology Decreased neutrophils 44 3.3 9 0 Decreased lymphocytes 38 1.6 3.4 0 Decreased hemoglobin 30 0 14

Decreased platelets 15 0 5 0 Clinically relevant adverse reactions occurring in

<10% of patients were: Eye: blurred vision, photophobia, diplopia, reduced visual acuity Gastrointestinal: dry mouth, stomatitis, mouth ulceration General: pyrexia Hepatobiliary: cholangitis, hepatotoxicity, liver disorder Neurological: cognitive disorders (memory impairment, amnesia, confusional state, disturbance in attention, attention deficit/hyperactivity disorder) Skin and subcutaneous tissue: alopecia, skin pigment changes (hypopigmentation, depigmentation, discoloration, hyperpigmentation), photosensitivity reactions.

Postmarketing Experience

The following adverse reactions have been identified during post-approval use of TURALIO. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Investigations: Blood creatine phosphokinase increased

Use with Hepatotoxic Products

TURALIO can cause hepatotoxicity. In patients with increased serum transaminases, total bilirubin, or direct bilirubin (>ULN) or active liver or biliary tract disease, avoid coadministration of TURALIO with other products known to cause hepatotoxicity .

Effect of Other Drugs or Food on

TURALIO Table 7: Effect of Other Drugs or Food on TURALIO Moderate or Strong CYP3A Inhibitors Clinical Impact Concomitant use of a moderate or strong CYP3A inhibitor may increase pexidartinib concentrations, which may increase the incidence and severity of adverse reactions of TURALIO. Management Reduce TURALIO dosage if concomitant use of moderate or strong CYP3A inhibitors, including grapefruit or grapefruit juice, cannot be avoided. Strong CYP3A Inducers Clinical Impact Concomitant use of a strong CYP3A inducer decreases pexidartinib concentrations , which may decrease the efficacy of TURALIO. Management Avoid concomitant use of strong CYP3A inducers, including St John's wort. UGT Inhibitors Clinical Impact Concomitant use of a UGT inhibitor increases pexidartinib concentrations, which may increase the incidence and severity of adverse reactions of TURALIO. Management Reduce TURALIO dosage if concomitant use of UGT inhibitors cannot be avoided.

Acid-Reducing Agents Clinical Impact Concomitant use of a PPI decreases pexidartinib concentrations, which may decrease the efficacy of TURALIO. Management Avoid concomitant use of PPIs with TURALIO. As an alternative to PPIs, use locally-acting antacids or H 2 -receptor antagonists . High-Fat Meal Clinical Impact Taking TURALIO with a high-fat meal increased pexidartinib concentrations , which may increase the incidence and severity of TURALIO adverse reactions, including hepatotoxicity. Management Take TURALIO with a low-fat meal (approximately 11 to 14 grams of total fat). Avoid taking TURALIO with a high-fat meal (approximately 55 to 65 grams of total fat) .

Effect of

TURALIO on Other Drugs Table 8: Effect of TURALIO on Other Drugs CYP3A Substrates Clinical Impact TURALIO is a moderate CYP3A inducer. Concomitant use of TURALIO decreases the concentration of CYP3A substrates , which may reduce the efficacy of these substrates. Management Avoid coadministration of TURALIO with hormonal contraceptives.

Avoid concomitant use of TURALIO with other CYP3A substrates, where minimal concentration changes may lead to serious therapeutic failures. If concomitant use is unavoidable, increase the CYP3A substrate dosage in accordance with approved product labeling.

Pregnancy Risk Summary Based on findings from animal studies and its mechanism of action , TURALIO may cause embryo-fetal harm when administered to a pregnant woman. The available human data do not establish the presence or absence of major birth defects or miscarriage related to the use of TURALIO. Oral administration of pexidartinib to pregnant animals during the period of organogenesis resulted in malformations, post-implantation loss, and abortion at maternal exposures that were approximately equal to the human exposure at the recommended dose (see Data ). Advise pregnant women of the potential risk to a fetus. 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.

Data Animal Data Embryo-fetal development studies investigating the administration of pexidartinib during the period of organogenesis were conducted in rats and rabbits. In rats, pexidartinib resulted in increased post-implantation loss and fetal malformations including localized fetal edema, absence of kidney and ureter, abnormalities of the reproductive tract, and developmental variations including misshapen kidney, decreased skeletal ossification and higher mean litter proportions of slightly or moderately malaligned sternebrae at doses of 40 mg/kg (approximately equal to the human exposure at the recommended dose). In rabbits, administration of pexidartinib resulted in increased post-implantation loss, abortion, and fetal malformations including absence of kidney or ureter, rudimentary, misshapen or malpositioned kidney, rib abnormalities, and skeletal variations of accessory skull bones at doses of 60 mg/kg (approximately equal to the human exposure at the recommended dose).

Pediatric Use The safety and effectiveness of TURALIO in pediatric patients have not been established.

Due to the high plasma protein binding, TURALIO is not expected to be dialyzable .