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 |
| System Organ Class | Frequency (all Grades) | Adverse Drug Reaction | Frequency |
| All Gradesa (%) | Grades 3-4a (%) |
| Infections and infestations | Very common | pneumonia* | 24 | 20 |
| urinary tract infection* | 15 | 7 |
| All other infections (viral, bacterial, fungal)*, b, c, d | 63 | 39 |
| Common | septic shock* | 6 | 4 |
| sepsis* | 9 | 8 |
| sinusitis | 3 | 1 |
| Neoplasms benign, malignant and unspecified (incl. cysts and polyps) | Not known | differentiation syndrome | Not known | Not known |
| Blood and lymphatic disorders | Very common | febrile neutropaenia* | 34 | 32 |
| neutropaenia* | 32 | 30 |
| thrombocytopaenia*, e | 41 | 38 |
| anaemia | 38 | 31 |
| leukopaenia | 20 | 18 |
| Uncommon | pancytopaenia* | < 1 | < 1 |
| Immune system disorders | Common | hypersensitivity including anaphylactic reactionf | 1 | < 1 |
| Metabolism and nutrition disorders | Very common | hyperglycaemia | 13 | 3 |
| Nervous system disorders | Very common | headache | 16 | 1 |
| Cardiac disorders | Uncommon | cardiomyopathy | < 1 | < 1 |
| Respiratory, thoracic and mediastinal disorders | Very common | epistaxis | 14 | 2 |
| Not known | interstitial lung disease | Not known | Not known |
| Gastrointestinal disorders | Very common | diarrhoea | 31 | 2 |
| vomiting | 18 | 1 |
| nausea | 33 | < 1 |
| Common | stomatitis | 7 | 1 |
| Not known | enterocolitis, including neutropaenic colitis, caecitis* | Not known | Not known |
| Hepatobiliary disorders | Very common | hepatic function abnormal | 11 | 3 |
| Common | hyperbilirubinaemiag | 5 | <1 |
| Skin and subcutaneous tissue disorders | Uncommon | acute febrile neutrophilic dermatosis (Sweet's syndrome) | < 1 | NA |
| General disorders and administration site conditions | Very common | pyrexia | 48 | 9 |
| a Worst National Cancer Institute Common Terminology Criteria for Adverse Events Grade. b Excluding pneumonia, urinary tract infection, sepsis, septic shock and sinusitis. c The most frequently reported "other infections" in study DACO-016 were: oral herpes, oral candidiasis, pharyngitis, upper respiratory tract infection, cellulitis, bronchitis, nasopharyngitis. d Including enterocolitis infectious. e Including haemorrhage associated with thrombocytopaenia, including fatal cases. f Including preferred terms hypersensitivity, drug hypersensitivity, anaphylactic reaction, anaphylactic shock, anaphylactoid reaction, anaphylactoid shock. g In clinical studies in AML and myelodysplastic syndrome (MDS), the reporting frequency for hyperbilirubinaemia was 11% for All Grades and 2% for Grade 3-4. * 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.
Differentiation syndrome
Cases of differentiation syndrome (also known as retinoic acid syndrome) have been reported in patients receiving decitabine. Differentiation syndrome may be fatal and symptoms and clinical findings include respiratory distress, pulmonary infiltrates, fever, rash, pulmonary oedema, peripheral oedema, rapid weight gain, pleural effusions, pericardial effusions, hypotension and renal dysfunction. Differentiation syndrome may occur with or without concomitant leucocytosis. Capillary leak syndrome and coagulopathy can also occur (see section 4.4).
Paediatric population
The safety assessment in paediatric patients is based on the limited safety data from a Phase I/II study to evaluate pharmacokinetics, safety and efficacy of Dacogen in paediatric patients (aged 1 to 14 years) with relapsed or refractory AML (n = 17) (see section 5.1). No new safety signal was observed in this paediatric study.
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 Yellow Card Scheme Website: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store