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Dacogen (decitabine) – Summary of product characteristics - L01BC08

Updated on site: 06-Oct-2017

Medication nameDacogen
ATC CodeL01BC08
Substancedecitabine
ManufacturerJanssen-Cilag International N V  

1 NAME OF THE MEDICINAL PRODUCT

Dacogen 50 mg powder for concentrate for solution for infusion.

2 QUALITATIVE AND QUANTITATIVE COMPOSITION

Each vial of powder for concentrate for solution for infusion contains 50 mg decitabine.

After reconstitution with 10 ml of water for injections, each ml of concentrate contains 5 mg of decitabine.

Excipients with known effect

Each vial contains 0.5 mmol potassium (E340) and 0.29 mmol sodium (E524).

For the full list of excipients, see section 6.1.

3 PHARMACEUTICAL FORM

Powder for concentrate for solution for infusion (powder for infusion).

White to almost white lyophilized powder.

4 CLINICAL PARTICULARS

4.1Therapeutic indications

Dacogen is indicated for the treatment of adult patients with newly diagnosed de novo or secondary acute myeloid leukaemia (AML), according to the World Health Organisation (WHO) classification, who are not candidates for standard induction chemotherapy.

4.2Posology and method of administration

Dacogen administration must be initiated under the supervision of physicians experienced in the use of chemotherapeutic medicinal products.

Posology

In a treatment cycle, Dacogen is administered at a dose of 20 mg/m2 body surface area by intravenous infusion over 1 hour repeated daily for 5 consecutive days (i.e., a total of 5 doses per treatment cycle). The total daily dose must not exceed 20 mg/m2 and the total dose per treatment cycle must not exceed 100 mg/m2. If a dose is missed, treatment should be resumed as soon as possible. The cycle should be repeated every 4 weeks depending on the patient's clinical response and observed toxicity. It is recommended that patients be treated for a minimum of 4 cycles; however, a complete or partial remission may take longer than 4 cycles to be obtained. Treatment may be continued as long as the patient shows response, continues to benefit or exhibits stable disease, i.e., in the absence of overt progression.

If after 4 cycles, the patient’s haematological values (e.g., platelet counts or absolute neutrophil count), have not returned to pre-treatment levels or if disease progression occurs (peripheral blast counts are increasing or bone marrow blast counts are worsening), the patient may be considered to be a non-responder and alternative therapeutic options to Dacogen should be considered.

Pre-medication for the prevention of nausea and vomiting is not routinely recommended but may be administered if required.

Management of myelosuppression and associated complications

Myelosuppression and adverse events related to myelosuppression (thrombocytopaenia, anaemia, neutropaenia, and febrile neutropaenia) are common in both treated and untreated patients with AML. Complications of myelosuppression include infections and bleeding. Treatment may be delayed at the discretion of the treating physician, if the patient experiences myelosuppression-associated complications, such as those described below:

Febrile neutropaenia (temperature ≥ 38.5°C and absolute neutrophil count < 1,000/µL)

Active viral, bacterial or fungal infection (i.e., requiring intravenous anti-infectives or extensive supportive care)

Haemorrhage (gastrointestinal, genito-urinary, pulmonary with platelets < 25,000/µL or any central nervous system haemorrhage)

Treatment with Dacogen may be resumed once these conditions have improved or have been stabilised with adequate treatment (anti-infective therapy, transfusions, or growth factors).

In clinical studies, approximately one-third of patients receiving Dacogen required a dose-delay. Dose reduction is not recommended.

Paediatric population

The safety and efficacy of Dacogen in children aged < 18 years have not yet been established. No data are available.

Hepatic impairment

Studies in patients with hepatic impairment have not been conducted. The need for dose adjustment in patients with hepatic impairment has not been evaluated. If worsening hepatic function occurs, patients should be carefully monitored (see sections 4.4 and 5.2).

Renal impairment

Studies in patients with renal impairment have not been conducted. The need for dose adjustment in patients with renal impairment has not been evaluated (see section 4.4 and 5.2).

Method of administration

Dacogen is administered by intravenous infusion. A central venous catheter is not required.

For instructions on reconstitution and dilution of the medicinal product before administration, see section 6.6.

4.3Contraindications

Hypersensitivity to decitabine or to any of the excipients, listed in section 6.1.

Breast-feeding (see section 4.6)

4.4Special warnings and precautions for use

Myelosuppression

Myelosuppression and complications of myelosuppression, including infections and bleeding that occur in patients with AML may be exacerbated with Dacogen treatment. Therefore patients are at increased risk for severe infections (due to any pathogen such as bacterial, fungal and viral), with potentially fatal outcome (see section 4.8). Patients should be monitored for signs and symptoms of infection and treated promptly.

In clinical studies, the majority of patients had baseline Grade 3/4 myelosuppression. In patients with baseline Grade 2 abnormalities, worsening of myelosuppression was seen in most patients and more frequently than in patients with baseline Grade 1 or 0 abnormalities. Myelosuppression caused by Dacogen is reversible. Complete blood and platelet counts should be performed regularly, as clinically

indicated and prior to each treatment cycle. In the presence of myelosuppression or its complications, treatment with Dacogen may be interrupted and/or supportive measures instituted (see sections 4.2 and 4.8).

Respiratory, thoracic and mediastinal disorders

Cases of interstitial lung disease (ILD) (including pulmonary infiltrates, organising pneumonia and pulmonary fibrosis) without signs of infectious aetiology have been reported in patients receiving decitabine. Careful assessment of patients with an acute onset or unexplained worsening of pulmonary symptoms should be performed to exclude ILD. If ILD is confirmed, appropriate treatment should be initiated (see section 4.8).

Hepatic impairment

Use in patients with hepatic impairment has not been established. Caution should be exercised in the administration of Dacogen to patients with hepatic impairment and patients should be monitored closely (see sections 4.2 and 5.2).

Renal impairment

Use in patients with severe renal impairment has not been studied. Caution should be exercised in the administration of Dacogen to patients with severe renal impairment (Creatinine Clearance [CrCl]

< 30 ml/min) and these patients should be monitored closely (see section 4.2).

Cardiac disease

Patients with a history of severe congestive heart failure or clinically unstable cardiac disease were excluded from clinical studies and therefore the safety and efficacy of Dacogen in these patients has not been established.

Excipients

This medicine contains 0.5 mmol potassium per vial. After reconstitution and dilution of the solution for intravenous infusion, this medicine contains less than 1 mmol (39 mg) of potassium per dose, i.e. essentially ‘potassium- free’.

This medicine contains 0.29 mmol sodium per vial. After reconstitution and dilution of the solution for intravenous infusion, this medicine contains between 0.6-6 mmol sodium per dose depending on the infusion fluid for dilution. To be taken into consideration by patients on a controlled sodium diet.

4.5Interaction with other medicinal products and other forms of interaction

No formal clinical drug interaction studies with decitabine have been conducted.

There is the potential for a drug-drug interaction with other agents which are also activated by sequential phosphorylation (via intracellular phosphokinase activities) and/or metabolised by enzymes implicated in the inactivation of decitabine (e.g., cytidine deaminase). Therefore, caution should be exercised if these active substances are combined with decitabine.

Impact of co-administered medicinal products on decitabine

Cytochrome (CYP) 450-mediated metabolic interactions are not anticipated as decitabine metabolism is not mediated by this system but by oxidative deamination.

Impact of decitabine on co-administered medicinal products

Given its low in vitro plasma protein binding ( 1%), decitabine is unlikely to displace co-administered medicinal products from their plasma protein binding. Decitabine has been shown to be a weak inhibitor of P-gp mediated transport in vitro and is therefore also not expected to affect P-gp mediated transport of co-administered medicinal products (see section 5.2).

4.6Fertility, pregnancy and lactation

Women of childbearing potential/Contraception in males and females

Women of childbearing potential must use effective contraceptive measures and avoid becoming pregnant while being treated with Dacogen. The time period following treatment with Dacogen where

it is safe to become pregnant is unknown. Men should use effective contraceptive measures and be advised to not father a child while receiving Dacogen, and for 3 months following completion of treatment (see section 5.3).

The use of decitabine with hormonal contraceptives has not been studied.

Pregnancy

There are no adequate data on the use of Dacogen in pregnant women. Studies have shown that decitabine is teratogenic in rats and mice (see section 5.3). The potential risk for humans is unknown. Based on results from animal studies and its mechanism of action, Dacogen should not be used during pregnancy and in women of childbearing potential not using effective contraception. If Dacogen is used during pregnancy, or if a patient becomes pregnant while receiving this medicinal product, the patient should be apprised of the potential hazard to the foetus.

Breast-feeding

It is not known whether decitabine or its metabolites are excreted in breast milk. Dacogen is contraindicated during breast-feeding; therefore if treatment with this medicine is required, breast-feeding must be discontinued (see section 4.3).

Fertility

No human data on the effect of decitabine on fertility are available. In non-clinical animal studies, decitabine alters male fertility and is mutagenic. Because of the possibility of infertility as a consequence of Dacogen therapy, men should seek advice on conservation of sperm and female patients of childbearing potential should seek consultation regarding oocyte cryopreservation prior to initiation of treatment.

4.7Effects on ability to drive and use machines

Dacogen has moderate influence on the ability to drive and use machines. Patients should be advised that they may experience undesirable effects such as anaemia during treatment. Therefore, caution should be recommended when driving a car or operating machines.

4.8Undesirable effects

Summary of the safety profile

The most common adverse drug reactions (≥ 35%) reported are pyrexia, anaemia and thrombocytopaenia.

The most common Grade 3/4 adverse drug reactions (≥ 20%) included pneumonia, thrombocytopaenia, neutropaenia, febrile neutropaenia and anaemia.

In clinical studies, 30% of patients treated with Dacogen and 25% of patients treated in the comparator arm had adverse events with an outcome of death during treatment or within 30 days after the last dose of study drug.

In the Dacogen treatment group, there was a higher incidence of treatment discontinuation due to adverse events in women compared to men (43% versus 32%).

Tabulated list of adverse drug reactions

Adverse drug reactions reported in 293 AML patients treated with Dacogen are summarised in Table 1. The following table reflects data from AML clinical studies and from post-marketing experience. The adverse drug reactions are listed by frequency category. Frequency categories are defined as follows: Very common (≥ 1/10), common (≥ 1/100 to < 1/10), uncommon (≥ 1/1,000 to < 1/100), rare (≥ 1/10,000 to < 1/1,000), very rare (< 1/10,000), not known (frequency cannot be estimated from the available data).

Within each frequency grouping, adverse drug reactions are presented in order of decreasing seriousness.

Table 1: Adverse drug reactions identified with Dacogen

 

Frequency

 

Frequency

 

 

All Gradesa

Grades 3-4a

System Organ Class

(all Grades)

Adverse Drug Reaction

(%)

(%)

Infections and

Very common

pneumonia*

infestations

 

urinary tract infection*

 

 

All other infections (viral,

 

 

bacterial, fungal)*, b, c, d

 

 

 

Common

septic shock*

 

 

sepsis*

 

 

sinusitis

Blood and lymphatic

Very common

febrile neutropaenia*

disorders

 

neutropaenia*

 

 

thrombocytopaenia*, e

 

 

anaemia

 

 

leukopaenia

 

Uncommon

pancytopaenia*

< 1

< 1

Immune system

Common

hypersensitivity including

< 1

disorders

 

anaphylactic reactionf

 

 

Nervous system

Very common

headache

disorders

 

 

 

 

Respiratory, thoracic

Very common

epistaxis

and mediastinal

Not known

interstitial lung disease

Not known

Not known

disorders

 

 

 

 

Gastrointestinal

Very common

diarrhoea

disorders

 

vomiting

 

 

nausea

< 1

 

Common

stomatitis

 

Not known

enterocolitis, including

Not known

Not known

 

 

neutropaenic colitis,

 

 

 

 

caecitis*

 

 

Skin and

Uncommon

acute febrile neutrophilic

< 1

NA

subcutaneous tissue

 

dermatosis (Sweet’s

 

 

disorders

 

syndrome)

 

 

General disorders and

Very common

pyrexia

administration site

 

 

 

 

conditions

 

 

 

 

aWorst National Cancer Institute Common Terminology Criteria for Adverse Events Grade.

bExcluding pneumonia, urinary tract infection, sepsis, septic shock and sinusitis.

cThe most frequently reported "other infections" in study DACO-016 were: oral herpes, oral candidiasis, pharyngitis, upper respiratory tract infection, cellulitis, bronchitis, nasopharyngitis.

dIncluding enterocolitis infectious.

eIncluding haemorrhage associated with thrombocytopaenia, including fatal cases.

fIncluding preferred terms hypersensitivity, drug hypersensitivity, anaphylactic reaction, anaphylactic shock, anaphylactoid reaction, anaphylactoid shock.

* Includes events with a fatal outcome. NA = Not applicable

Description of selected adverse drug reactions

Haematologic adverse drug reactions

The most commonly reported haematologic adverse drug reactions associated with Dacogen treatment included febrile neutropaenia, thrombocytopaenia, neutropaenia, anaemia and leukopaenia.

Serious bleeding-related adverse drug reactions, some of which lead to a fatal outcome, such as central nervous system (CNS) haemorrhage (2%) and gastrointestinal (GI) haemorrhage (2%), in the context of severe thrombocytopaenia, were reported in patients receiving decitabine.

Haematological adverse drug reactions should be managed by routine monitoring of complete blood counts and early administration of supportive treatments as required. Supportive treatments include, administration of prophylactic antibiotics and/or growth factor support (e.g., G-CSF) for neutropaenia and transfusions for anaemia or thrombocytopaenia according to institutional guidelines. For situations where decitabine administration should be delayed, see section 4.2.

Infections and infestations adverse drug reactions

Serious infection-related adverse drug reactions, with potentially fatal outcome, such as septic shock, sepsis, pneumonia, and other infections (viral, bacterial and fungal) were reported in patients receiving decitabine.

Gastrointestinal disorders

Occurrences of enterocolitis, including neutropaenic colitis, caecitis have been reported during treatment with decitabine. Enterocolitis may lead to septic complications and may be associated with fatal outcome.

Respiratory, thoracic and mediastinal disorders

Cases of interstitial lung disease (including pulmonary infiltrates, organising pneumonia and pulmonary fibrosis) without signs of infectious aetiology have been reported in patients receiving decitabine.

Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the national reporting system listed in Appendix V.

4.9Overdose

There is no direct experience of human overdose and no specific antidote. However, early clinical study data in published literature at doses greater than 20 times higher than the current therapeutic dose, reported increased myelosuppression including prolonged neutropaenia and thrombocytopaenia. Toxicity is likely to manifest as exacerbations of adverse drug reactions, primarily myelosuppression. Treatment for overdose should be supportive.

5 PHARMACOLOGICAL PROPERTIES

5.1Pharmacodynamic properties

Pharmacotherapeutic group: Antineoplastic agents, antimetabolites, pyrimidine analogues; ATC Code: L01BC08

Mechanism of action

Decitabine (5-aza-2-deoxycytidine) is a cytidine deoxynucleoside analogue that selectively inhibits DNA methyltransferases at low doses, resulting in gene promoter hypomethylation that can result in reactivation of tumour suppressor genes, induction of cellular differentiation or cellular senescence followed by programmed cell death.

Clinical experience

The use of Dacogen was studied in an open-label, randomised, multicentre Phase III study (DACO-016) in subjects with newly diagnosed de novo or secondary AML according to the WHO

classification. Dacogen (n = 242) was compared to treatment choice (TC, n = 243) which consisted of patient’s choice with physician’s advice of either supportive care alone (n = 28, 11.5%) or 20 mg/m2 cytarabine subcutaneously once daily for 10 consecutive days repeated every 4 weeks

(n = 215, 88.5%). Dacogen was administered as a 1-hour intravenous infusion of 20 mg/m2 once daily for 5 consecutive days repeated every 4 weeks.

Subjects who were considered candidates for standard induction chemotherapy were not included in the study as shown by the following baseline characteristics. The median age for the intent-to-treat (ITT) population was 73 years (range 64 to 91 years). Thirty-six percent of subjects had poor-risk cytogenetics at baseline. The remainder of the subjects had intermediate-risk cytogenetics. Patients with favourable cytogenetics were not included in the study. Twenty-five percent of subjects had an ECOG performance status ≥ 2. Eighty-one percent of subjects had significant comorbidities (e.g., infection, cardiac impairment, pulmonary impairment). The number of patients treated with Dacogen by racial group was White 209 (86.4%) and Asian 33 (13.6%).

The primary endpoint of the study was overall survival. The secondary endpoint was complete remission rate that was assessed by independent expert review. Progression-free survival and Event-free survival were tertiary endpoints.

The median overall survival in the --ITT population was 7.7 months in subjects treated with Dacogen compared to 5.0 months for subjects in the TC arm (hazard ratio 0.85; 95% CI: 0.69, 1.04,

p = 0.1079). The difference did not reach statistical significance, however, there was a trend for improvement in survival with a 15% reduction in the risk of death for subjects in the Dacogen arm (Figure 1). When censored for potentially disease modifying subsequent therapy (i.e., induction chemotherapy or hypomethylating agent) the analysis for overall survival showed a 20% reduction in the risk of death for subjects in the Dacogen arm [HR = 0.80, (95% CI: 0.64, 0.99),

p-value = 0.0437)].

Figure 1. Overall survival (ITT population).

 

 

 

 

 

 

 

 

 

 

 

 

 

DACOGEN

N

Death (%)

Median

95% CI

 

 

 

 

197 (81)

7.7

(6.2, 9.2)

 

 

 

 

Total TC

199 (82)

5.0

(4.3, 6.3)

 

 

 

 

 

 

 

 

 

Alive

 

 

 

 

HR (95% CI):

0.85 (0.69, 1.04)

 

 

 

Logrank p-value:

0.1079

 

of Subjects

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Percent

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Time (Months)

No. of Subjects at Risk

DACOGEN

Total TC

In an analysis with an additional 1 year of mature survival data, the effect of Dacogen on overall survival demonstrated a clinical improvement compared to the TC arm (7.7 months vs. 5.0 months, respectively, hazard ratio = 0.82, 95% CI: 0.68, 0.99, nominal p-value = 0.0373, Figure 2).

Figure 2. Analysis of mature overall survival data (ITT population).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DACOGEN

N

Death (%)

Median

95% CI

 

 

 

 

 

219 (90)

7.7

(6.2, 9.2)

 

 

 

 

 

Total TC

 

227 (93)

5.0

(4.3, 6.3)

 

 

 

 

 

 

 

 

 

 

 

 

Alive

 

 

 

 

 

HR (95% CI):

0.82 (0.68, 0.99)

 

 

 

 

 

Logrank p-value:

0.0373

 

 

of Subjects

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Percent

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Time (Months)

No. of Subjects at Risk

 

 

 

 

 

 

 

 

DACOGEN

Total TC

Based on the initial analysis in the ITT population, a statistically significant difference in complete remission rate (CR + CRp) was achieved in favour of subjects in the Dacogen arm, 17.8% (43/242) compared to the TC arm, 7.8% (19/243); treatment difference 9.9% (95% CI: 4.07; 15.83), p = 0.0011. The median time to best response and median duration of best response in patients who achieved a CR or CRp were 4.3 months and 8.3 months, respectively. Progression-free survival was significantly longer for subjects in the Dacogen arm, 3.7 months (95% CI: 2.7, 4.6) compared with subjects in the TC arm, 2.1 months (95% CI: 1.9, 3.1); hazard ratio 0.75 (95% CI: 0.62, 0.91), p = 0.0031. These results as well as other endpoints are shown in Table 2.

Table 2:

Other efficacy endpoints for Study DACO-016 (ITT population)

 

 

 

 

 

TC (combined

 

 

 

 

Dacogen

 

group)

 

 

Outcomes

 

n = 242

 

n = 243

 

p-value

CR + CRp

 

43 (17.8%)

 

19 (7.8%)

 

0.0011

 

 

 

OR = 2.5

 

 

 

 

 

(1.40, 4.78)b

 

 

CR

 

38 (15.7%)

 

18 (7.4%)

 

-

EFSa

 

3.5

 

2.1

 

0.0025

 

 

(2.5, 4.1)b

 

(1.9, 2.8)b

 

 

 

 

 

HR = 0.75

 

 

 

 

 

(0.62, 0.90)b

 

 

PFSa

 

3.7

 

2.1

 

0.0031

 

 

(2.7, 4.6)b

 

(1.9, 3.1)b

 

 

HR = 0.75 (0.62, 0.91)b

CR = complete remission; CRp = complete remission with incomplete platelet recovery, EFS = event-free survival, PFS = progression-free survival, OR = odds ratio, HR = hazard ratio

- = Not evaluable

aReported as median months

b95% confidence intervals

Overall survival and complete remission rates in pre-specified disease-related sub-groups (i.e., cytogenetic risk, Eastern Cooperative Oncology Group [ECOG] score, age, type of AML, and baseline bone marrow blast count) were consistent with results for the overall study population.

Dacogen-treated subjects (11%, 24/223) experienced worsening of hyperglycaemia compared with subjects in the TC arm (6%, 13/212).

The use of Dacogen as initial therapy was also evaluated in an open-label, single-arm, Phase II study (DACO-017) in 55 subjects > 60 years with AML according to the WHO classification. The primary endpoint was complete remission (CR) rate that was assessed by independent expert review. The secondary endpoint of the study was overall survival. Dacogen was administered as a 1-hour intravenous infusion of 20 mg/m2 once daily for 5 consecutive days repeated every 4 weeks. In the ITT analysis, a CR rate of 23.6% (95% CI: 13.2, 37) was observed in 13/55 subjects treated with Dacogen. The median time to CR was 4.1 months, and the median duration of CR was 18.2 months. The median overall survival in the ITT population was 7.6 months (95% CI: 5.7, 11.5).

The efficacy and safety of Dacogen has not been evaluated in patients with acute promyelocytic leukaemia or CNS leukaemia.

Paediatric population

The European Medicines Agency has deferred the obligation to submit the results of studies with Dacogen in one or more subsets of the paediatric population for the treatment of acute myeloid leukaemia (see section 4.2 for information on paediatric use).

5.2Pharmacokinetic properties

The population pharmacokinetic (PK) parameters of decitabine were pooled from 3 clinical studies in 45 patients with AML or myelodysplastic syndrome (MDS) utilizing the 5-Day regimen. In each study, decitabine PK was evaluated on the fifth day of the first treatment cycle.

Distribution

The pharmacokinetics of decitabine following intravenous administration as a 1-hour infusion were described by a linear two-compartment model, characterised by rapid elimination from the central compartment and by relatively slow distribution from the peripheral compartment. For a typical patient (weight 70 kg/body surface area 1.73 m2) the decitabine pharmacokinetic parameters are listed in the Table 3 below.

Table 3: Summary of population PK analysis for a typical patient receiving daily 1-hour infusions of Dacogen 20 mg/m2 over 5 days every 4 weeks

Parameter a

Predicted Value

95% CI

Cmax (ng/ml)

88.5 - 129

AUCcum (ng.h/ml)

- 695

t1/2 (min)

68.2

54.2

- 79.6

Vdss (L)

84.1 - 153

CL (L/h)

- 359

a The total dose per cycle was 100 mg/m2

Decitabine exhibits linear PK and following the intravenous infusion, steady-state concentrations are reached within 0.5 hour. Based on model simulation, PK parameters were independent of time (i.e.,

did not change from cycle to cycle) and no accumulation was observed with this dosing regimen. Plasma protein binding of decitabine is negligible (< 1%). Decitabine Vdss in cancer patients is large indicating distribution into peripheral tissues. There was no evidence of dependencies on age, creatinine clearance, total bilirubin, or disease.

Biotransformation

Intracellularly, decitabine is activated through sequential phosphorylation via phosphokinase activities to the corresponding triphosphate, which is then incorporated by the DNA polymerase. In vitro metabolism data and the human mass balance study results indicated that the cytochrome P450 system is not involved in the metabolism of decitabine. The primary route of metabolism is likely through deamination by cytidine deaminase in the liver, kidney, intestinal epithelium and blood. Results from the human mass-balance study showed that unchanged decitabine in plasma accounted for approximately 2.4% of total radioactivity in plasma. The major circulating metabolites are not believed to be pharmacologically active. The presence of these metabolites in urine together with the high total body clearance and low urinary excretion of unchanged decitabine in the urine (~4% of the dose) indicate that decitabine is appreciably metabolized in vivo. In vitro studies show that decitabine does not inhibit nor induce CYP 450 enzymes up to more than 20-fold of the therapeutic maximum observed plasma concentration (Cmax). Thus; CYP-mediated metabolic drug interactions are not anticipated, and decitabine is unlikely to interact with agents metabolized through these pathways. In addition, in vitro data show that decitabine is a poor P-gp substrate.

Elimination

Mean plasma clearance following intravenous administration in cancer subjects was > 200 L/h with moderate inter-subject variability (coefficient of variation [CV] is approximately 50%). Excretion of unchanged drug appears to play only a minor role in the elimination of decitabine.

Results from a mass balance study with radioactive 14C-decitabine in cancer patients showed that 90% of the administered dose of decitabine (4% unchanged drug) is excreted in the urine.

Additional information on special populations

The effects of renal or hepatic impairment, gender, age or race on the pharmacokinetics of decitabine have not been formally studied. Information on special populations was derived from pharmacokinetic data from the 3 studies noted above, and from one Phase I study in MDS subjects, (N = 14;

15 mg/m2 x 3-hours q8h x 3 days).

Elderly

Population pharmacokinetic analysis showed that decitabine pharmacokinetics are not dependent on age (range studied 40 to 87 years; median 70 years).

Gender

Population pharmacokinetic analysis of decitabine did not show any clinically relevant difference between men and women.

Race

Most of the patients studied were Caucasian. However, the population pharmacokinetic analysis of decitabine indicated that race had no apparent effect on the exposure to decitabine.

Hepatic impairment

The PK of decitabine have not been formally studied in patients with hepatic impairment. Results from a human mass-balance study and in vitro experiments mentioned above indicated that the CYP enzymes are unlikely to be involved in the metabolism of decitabine. In addition, the limited data from the population PK analysis indicated no significant PK parameter dependencies on total bilirubin concentration despite a wide range of total bilirubin levels. Thus, decitabine exposure is not likely to be affected in patients with impaired hepatic function.

Renal impairment

The PK of decitabine have not been formally studied in patients with renal insufficiency. The population PK analysis on the limited decitabine data indicated no significant PK parameter dependencies on normalized creatinine clearance, an indicator of renal function. Thus, decitabine exposure is not likely to be affected in patients with impaired renal function.

5.3Preclinical safety data

Formal carcinogenicity studies have not been performed with decitabine. Evidence from the literature indicates that decitabine has carcinogenic potential. The available data from in vitro and in vivo studies provide sufficient evidence that decitabine has genotoxic potential. Data from the literature also indicate that decitabine has adverse effects on all aspects of the reproductive cycle, including fertility, embryo-foetal development and post-natal development. Multi-cycle repeat-dose toxicity studies in rats and rabbits indicated that the primary toxicity was myelosuppression, including effects on bone marrow, which was reversible on cessation of treatment. Gastrointestinal toxicity was also observed and in males, testicular atrophy which did not reverse over the scheduled recovery periods. Decitabine administration to neonatal/juvenile rats showed a comparable general toxicity profile as in older rats. Neurobehavioural development and reproductive capacity were unaffected when neonatal/juvenile rats were treated at dose levels inducing myelosuppression. See section 4.2 for information on paediatric use.

6 PHARMACEUTICAL PARTICULARS

6.1List of excipients

Potassium dihydrogen phosphate (E340)

Sodium hydroxide (E524)

Hydrochloric acid (for pH adjustment)

6.2Incompatibilities

This medicinal product must not be mixed with other medicinal products except those mentioned in section 6.6.

6.3Shelf life

Unopened vial 3 years.

Reconstituted and diluted solution

Within 15 minutes of reconstitution, the concentrate (in 10 ml of sterile water for injections) must be further diluted with cold (2°C - 8°C) infusion fluids. This prepared diluted solution for intravenous infusion can be stored at 2°C - 8°C for up to a maximum of 3 hours, followed by up to 1 hour at room temperature (20°C - 25°C) before administration.

From a microbiological point of view, the product should be used within the time period recommended above. It is the responsibility of the user to follow the recommended storage times and conditions and ensure that reconstitution has taken place in aseptic conditions.

6.4Special precautions for storage

Do not store above 25 C.

For storage conditions of the reconstituted and diluted medicinal product, see section 6.3.

6.5Nature and contents of container

20 ml clear colourless Type I glass vial sealed with a butyl rubber stopper and an aluminium seal with plastic flip-off cap containing 50 mg decitabine.

Pack size: 1 vial.

6.6Special precautions for disposal and other handling

Recommendations for safe handling

Skin contact with the solution should be avoided and protective gloves must be worn. Standard procedures for dealing with cytotoxic medicinal products should be adopted.

Reconstitution procedure

The powder should be aseptically reconstituted with 10 ml of water for injections. Upon reconstitution, each ml contains approximately 5 mg of decitabine at pH 6.7 to 7.3. Within 15 minutes of reconstitution, the solution must be further diluted with cold infusion fluids (sodium chloride

9 mg/ml [0.9%] solution for injection or 5% glucose solution for injection) to a final concentration of 0.1 to 1.0 mg/ml. For the shelf-life and the precaution for storage after reconstitution, see section 6.3.

Dacogen should not be infused through the same intravenous access/line with other medicinal products.

Disposal

This medicinal product is for single use only. Any unused medicinal product or waste material should be disposed of in accordance with local requirements.

7 MARKETING AUTHORISATION HOLDER

Janssen-Cilag International NV

Turnhoutseweg 30

B-2340 Beerse

Belgium

8 MARKETING AUTHORISATION NUMBER

EU/1/12/792/001

9 DATE OF FIRST AUTHORISATION/RENEWAL OF THE AUTHORISATION

Date of first authorisation: 20 September 2012

Date of latest renewal:

10 DATE OF REVISION OF THE TEXT

Detailed information on this medicinal product is available on the website of the European Medicines Agency (EMA) http://www.ema.europa.eu/

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