Zolinza Drug Information

® is indicated for the treatment of cutaneous manifestations in patients with cutaneous T-cell lymphoma who have progressive, persistent or recurrent disease on or following two systemic therapies. ZOLINZA is a histone deacetylase (HDAC) inhibitor indicated for the treatment of cutaneous manifestations in patients with cutaneous T-cell lymphoma (CTCL) who have progressive, persistent or recurrent disease on or following two systemic therapies.

Dosing Information

The recommended dose is 400 mg orally once daily with food. Treatment may be continued as long as there is no evidence of progressive disease or unacceptable toxicity. ZOLINZA capsules should not be opened or crushed .

Dose Modifications For Toxicity

If a patient is intolerant to therapy, the dose may be reduced to 300 mg orally once daily with food. The dose may be further reduced to 300 mg once daily with food for 5 consecutive days each week, as necessary. Hepatic Impairment Reduce the starting dose to 300 mg orally once daily with food in patients with mild to moderate hepatic impairment (bilirubin 1 to 3 × ULN or AST greater than ULN). There is insufficient evidence to recommend a starting dose for patients with severe hepatic impairment (bilirubin greater than 3 × ULN) .

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 ZOLINZA was evaluated in 107 CTCL patients in two single arm clinical studies in which 86 patients received 400 mg once daily. The data described below reflect exposure to ZOLINZA 400 mg once daily in the 86 patients for a median number of 97.5 days on therapy (range 2 to 480+ days). Seventeen (19.8%) patients were exposed beyond 24 weeks and 8 (9.3%) patients were exposed beyond 1 year.

The population of CTCL patients studied was 37 to 83 years of age, 47.7% female, 52.3% male, and 81.4% white, 16.3% black, and 1.2% Asian or multi-racial. Common Adverse Reactions The most common drug-related adverse reactions can be classified into 4 symptom complexes: gastrointestinal symptoms (diarrhea, nausea, anorexia, weight decrease, vomiting, constipation), constitutional symptoms (fatigue, chills), hematologic abnormalities (thrombocytopenia, anemia), and taste disorders (dysgeusia, dry mouth). The most common serious drug-related adverse reactions were pulmonary embolism and anemia. Table 1 summarizes the frequency of CTCL patients with specific adverse reactions, using the National Cancer Institute-Common Terminology Criteria for Adverse Events (NCI-CTCAE, version 3.0). Table 1: Clinical or Laboratory Adverse Reactions Occurring in CTCL Patients (Incidence ≥10% of patients) ZOLINZA 400 mg once daily (N=86) Adverse Reactions All Grades Grades 3-4 n % n % Fatigue 45 52.3 3

Diarrhea 45 52.3 0 0.0 Nausea 35 40.7 3 3.5 Dysgeusia 24

27.9 0

Thrombocytopenia 22 25.6 5 5.8 Anorexia 21 24.4 2 2.3 Weight Decreased

18 20.9 1

Muscle Spasms 17 19.8 2 2.3 Alopecia 16 18.6 0 0.0 Dry

Mouth 14 16.3 0

Blood Creatinine Increased 14 16.3 0 0.0 Chills 14 16.3 1 1.2

Vomiting 13 15.1 1

Constipation 13 15.1 0 0.0 Dizziness 13 15.1 1 1.2 Anemia 12

14.0 2

Decreased Appetite 12 14.0 1 1.2 Peripheral Edema 11 12.8 0 0.0

Headache 10 11.6 0

Pruritus 10 11.6 1 1.2 Cough 9 10.5 0 0.0 Upper Respiratory

Infection 9 10.5 0

Pyrexia 9 10.5 1 1.2

The frequencies of more severe thrombocytopenia, anemia and fatigue were increased at doses higher than 400 mg once daily of ZOLINZA. Serious Adverse Reactions The most common serious adverse reactions in the 86 CTCL patients in two clinical trials were pulmonary embolism reported in 4.7% (4/86) of patients, squamous cell carcinoma reported in 3.5% (3/86) of patients and anemia reported in 2.3% (2/86) of patients. There were single events of cholecystitis, death (of unknown cause), deep vein thrombosis, enterococcal infection, exfoliative dermatitis, gastrointestinal hemorrhage, infection, lobar pneumonia, myocardial infarction, ischemic stroke, pelviureteric obstruction, sepsis, spinal cord injury, streptococcal bacteremia, syncope, T-cell lymphoma, thrombocytopenia and ureteric obstruction. Discontinuations Of the CTCL patients who received the 400-mg once daily dose, 9.3% (8/86) of patients discontinued ZOLINZA due to adverse reactions.

These adverse reactions, regardless of causality, included anemia, angioneurotic edema, asthenia, chest pain, exfoliative dermatitis, death, deep vein thrombosis, ischemic stroke, lethargy, pulmonary embolism, and spinal cord injury. Dose Modifications Of the CTCL patients who received the 400-mg once daily dose, 10.5% (9/86) of patients required a dose modification of ZOLINZA due to adverse reactions. These adverse reactions included increased serum creatinine, decreased appetite, hypokalemia, leukopenia, nausea, neutropenia, thrombocytopenia and vomiting.

The median time to the first adverse reactions resulting in dose reduction was 42 days (range 17 to 263 days). Laboratory Abnormalities Laboratory abnormalities were reported in all of the 86 CTCL patients who received the 400-mg once-daily dose. Increased serum glucose was reported as a laboratory abnormality in 69% (59/86) of CTCL patients who received the 400-mg once daily dose; only 4 of these abnormalities were severe (Grade 3). Increased serum glucose was reported as an adverse reaction in 8.1% (7/86) of CTCL patients who received the 400-mg once daily dose. Transient increases in serum creatinine were detected in 46.5% (40/86) of CTCL patients who received the 400-mg once daily dose.

Of these laboratory abnormalities, 34 were NCI CTCAE Grade 1, 5 were Grade 2, and 1 was Grade 3. Proteinuria was detected as a laboratory abnormality (51.4%) in 38 of 74 patients tested. The clinical significance of this finding is unknown. Dehydration Based on reports of dehydration as a serious drug-related adverse reaction in clinical trials, patients were instructed to drink at least 2 L/day of fluids for adequate hydration.

Adverse Reactions in Non-CTCL Patients The frequencies of individual adverse reactions were substantially higher in the non-CTCL population. Drug-related serious adverse reactions reported in the non-CTCL population which were not observed in the CTCL population included single events of blurred vision, asthenia, hyponatremia, tumor hemorrhage, Guillain-Barré syndrome, renal failure, urinary retention, cough, hemoptysis, hypertension, and vasculitis. In patients recovering from bowel surgery and treated perioperatively with ZOLINZA, anastomotic healing complications including fistulas, perforations, and abscess formation have occurred.

Coumarin-Derivative Anticoagulants Prolongation of prothrombin time (PT) and International Normalized Ratio (INR)

were observed in patients receiving ZOLINZA concomitantly with coumarin-derivative anticoagulants. Physicians should monitor PT and INR more frequently in patients concurrently administered ZOLINZA and coumarin derivatives.

Other

HDAC Inhibitors Severe thrombocytopenia and gastrointestinal bleeding have been reported with concomitant use of ZOLINZA and other HDAC inhibitors (e.g., valproic acid). Monitor platelet count every 2 weeks for the first 2 months.

Pregnancy Risk Summary Based on its mechanism of action and findings from animal studies, ZOLINZA can cause fetal harm when administered to a pregnant woman . There are insufficient data on ZOLINZA use in pregnant women to inform a drug-associated risk of major birth defects and miscarriage. In animal reproduction studies, administration of vorinostat to pregnant rats and rabbits during the period of organogenesis caused adverse developmental outcomes at maternal exposures approximately 0.5 times the human exposure based on AUC 0-24 hours (see Data ). Advise pregnant women of the potential risk to a fetus. The estimated background risk of major birth defects and miscarriage for the indicated population 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 2-4% and 15-20%, respectively. Data Animal Data Results of animal studies indicate that vorinostat crosses the placenta and is found in fetal plasma at levels up to 50% of maternal concentrations.

Doses up to 50 and 150 mg/kg/day were tested in rats and rabbits, respectively (~0.5 times the human exposure based on AUC 0-24 hours ). Treatment-related developmental effects including decreased mean live fetal weights, incomplete ossifications of the skull, thoracic vertebra, sternebra, and skeletal variations (cervical ribs, supernumerary ribs, vertebral count and sacral arch variations) were seen in rats at the highest dose of vorinostat tested. Reductions in mean live fetal weight and an elevated incidence of incomplete ossification of the metacarpals were seen in rabbits dosed at 150 mg/kg/day. The no observed effect levels (NOELs) for these findings were 15 and 50 mg/kg/day (<0.1 times the human exposure based on AUC) in rats and rabbits, respectively.

A dose-related increase in the incidence of malformations of the gall bladder was noted in all drug treatment groups in rabbits versus the concurrent control.

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

No specific information is available on the treatment of overdosage of ZOLINZA. In the event of overdose, it is reasonable to employ the usual supportive measures, e.g., remove unabsorbed material from the gastrointestinal tract, employ clinical monitoring, and institute supportive therapy, if required. It is not known if vorinostat is dialyzable.