ZINFORO Powder for concentrate for solution Ref.[6598] Active ingredients: Ceftaroline fosamil

Hypersensitivity reactions

Serious and occasionally fatal hypersensitivity reactions are possible (see sections 4.3 and 4.8).

Severe cutaneous adverse reactions (SCARs), including Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), drug reaction with eosinophilia and systemic symptoms (DRESS), and acute generalised exanthematous pustulosis (AGEP) have been reported in association with beta-lactam antibiotics (including cephalosporins) treatment.

Patients who have a history of hypersensitivity to cephalosporins, penicillins or other beta-lactam antibacterials may also be hypersensitive to ceftaroline fosamil. Ceftaroline should be used with caution in patients with a history of non-severe hypersensitivity reactions to any other beta-lactam antibiotics (e.g. penicillins or carbapenems). If a severe allergic reaction or SCAR occurs during treatment with Zinforo, the medicinal product should be discontinued and appropriate measures taken.

With other beta-lactam antibiotics there have been reports of hypersensitivity reactions which progressed to Kounis syndrome (acute allergic coronary arteriospasm that can result in myocardial infarction, see section 4.8).

Clostridium difficile-associated diarrhoea

Antibacterial-associated colitis and pseudomembranous colitis have been reported with ceftaroline fosamil and may range in severity from mild to life threatening. Therefore, it is important to consider this diagnosis in patients who present with diarrhoea during or subsequent to the administration of ceftaroline fosamil (see section 4.8). In such circumstance, the discontinuation of therapy with ceftaroline fosamil and the use of supportive measures together with the administration of specific treatment for Clostridium difficile should be considered.

Non-susceptible organisms

Superinfections may occur during or following treatment with Zinforo.

Patients with pre-existing seizure disorder

Seizures have occurred in toxicology studies at 7-25 times human ceftaroline C_max levels (see section 5.3). Clinical study experience with ceftaroline fosamil in patients with pre-existing seizure disorders is very limited. Therefore, Zinforo should be used with caution in this patient population.

Direct antiglobulin test (Coombs test) seroconversion and potential risk of haemolytic anaemia

The development of a positive direct antiglobulin test (DAGT) may occur during treatment with cephalosporins. The incidence of DAGT seroconversion in patients receiving ceftaroline fosamil was 11.2% in the five pooled pivotal studies with administration every 12 hours (600 mg administered over 60 minutes every 12 hours) and 32.3% in a study in patients receiving ceftaroline fosamil every 8 hours (600 mg administered over 120 minutes every 8 hours), (see section 4.8). In clinical studies there was no evidence of haemolysis in patients who developed a positive DAGT on treatment. However, the possibility that haemolytic anaemia may occur in association with cephalosporins including Zinforo treatment cannot be ruled out. Patients experiencing anaemia during or after treatment with Zinforo should be investigated for this possibility.

Limitations of the clinical data

There is no experience with ceftaroline in the treatment of CAP in the following patient groups: the immunocompromised, patients with severe sepsis/septic shock, severe underlying lung disease (e.g. cystic fibrosis, see section 5.2), those with PORT Risk Class V, and/or CAP requiring ventilation at presentation, CAP due to methicillin-resistant S. aureus or patients requiring intensive care. Caution is advised when treating such patients.

There is no experience with ceftaroline in the treatment of cSSTI in the following patient groups: the immunocompromised, patients with severe sepsis/septic shock, necrotizing fasciitis, perirectal abscess and patients with third degree and extensive burns. There is limited experience in treating patients with diabetic foot infections. Caution is advised when treating such patients.

There are limited clinical trial data on the use of ceftaroline to treat cSSTI caused by S. aureus with an MIC of >1 mg/L. The recommended dosages of Zinforo shown in Tables 1 to 4 for the treatment of cSSTI caused by S. aureus with ceftaroline MIC of 2 or 4 mg/L are based on pharmacokinetic-pharmacodynamic modelling and simulation (see sections 4.2 and 5.1). Zinforo should not be used to treat cSSTI due to S. aureus for which the ceftaroline MIC is >4 mg/L.

The recommended dosage of Zinforo shown in Table 2 for paediatric patients <2 months of age are based on pharmacokinetic-pharmacodynamic modelling and simulation.

Infusion times of less than 60 minutes are based on pharmacokinetic and pharmacodynamic analyses only.

No clinical drug-drug interaction studies have been conducted with ceftaroline fosamil.

The interaction potential of ceftaroline or ceftaroline fosamil on medicinal products metabolised by CYP450 enzymes is expected to be low since they are not inhibitors nor inducers of CYP450 enzymes in vitro. Ceftaroline or ceftaroline fosamil are not metabolised by CYP450 enzymes in vitro, therefore co-administered CYP450 inducers or inhibitors are unlikely to influence the pharmacokinetics of ceftaroline.

Ceftaroline is neither a substrate, nor an inhibitor of renal uptake transporters (OCT2, OAT1, and OAT3) in vitro. Therefore, interactions of ceftaroline with medicinal products that are substrates or inhibitors (e.g. probenecid) of these transporters would not be expected.

Paediatric population

As with adults, the interaction potential is expected to be low in paediatrics.

Pregnancy

There are no or limited amount of data from the use of ceftaroline fosamil in pregnant women. Animal studies conducted in rat and rabbit do not indicate harmful effects with respect to reproductive toxicity at exposures similar to therapeutic concentrations. Following administration throughout pregnancy and lactation in the rat, there was no effect on pup birth weight or growth, although minor changes in foetal weight and delayed ossification of the interparietal bone were observed when ceftaroline fosamil was administered during organogenesis (see section 5.3).

As a precautionary measure, it is preferable to avoid the use of Zinforo during pregnancy unless the clinical condition of the woman requires treatment with an antibiotic with Zinforo’s antibacterial profile.

Breast-feeding

It is unknown whether ceftaroline fosamil or ceftaroline is excreted in human milk. A risk to the newborns/infants cannot be excluded. A decision must be made whether to discontinue breast-feeding or to discontinue/abstain from Zinforo therapy taking into account the benefit of breast-feeding for the child and the benefit of therapy for the woman.

Fertility

The effects of ceftaroline fosamil on fertility on humans have not been studied. Animal studies with ceftaroline fosamil do not indicate harmful effects with respect to fertility (see section 5.3).

Undesirable effects e.g. dizziness may occur and this may have an effect on the ability to drive and use of machines (see section 4.8).

Summary of the safety profile

The most common adverse reactions occurring in ≥ 3% of approximately 3242 patients treated with Zinforo in clinical studies were diarrhoea, headache, nausea, and pruritus, and were generally mild or moderate in severity. Clostridium difficile-associated disease (CDAD) and severe hypersensitivity reactions may also occur.

A greater incidence of rash in Asian patients (see below) and a greater incidence of DAGT seroconversion (see section 4.4) were observed in a study of adult patients with cSSTI conducted with Zinforo 600 mg administered over 120 minutes every 8 hours.

Tabulated list of adverse reactions

The following adverse reactions have been identified during clinical trials and post-marketing experience with Zinforo. Adverse reactions are classified according to System Organ Class and frequency. Frequency categories are derived according to the following conventions: 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), not known (cannot be estimated from the available data).

Table 5. Frequency of adverse reactions by system organ class from clinical trials and post-marketing experience:

^* Adverse Drug Reaction (ADR) identified post-marketing.
⁺ Risk of encephalopathy is higher in patients with renal impairment in whom the dose of ceftaroline has not been appropriately reduced (see sections 4.2 and 4.9).

Description of selected adverse reactions

Severe Cutaneous Adverse Reactions

SCARs (Stevens-Johnson syndrome, toxic epidermal necrolysis, drug reaction with eosinophilia and systemic symptoms, acute generalised exanthematous pustulosis) have been reported with beta-lactam antibiotics, including cephalosporins (see section 4.4).

Kounis Syndrome

Acute coronary syndrome associated with an allergic reaction (Kounis syndrome) has been reported with other beta-lactam antibiotics.

Rash

Rash was observed at a common frequency in both the pooled Phase III studies in cSSTI with administration of Zinforo every 12 hours (600 mg administered over 60 minutes every 12 hours) and the study in cSSTI with administration every 8 hours (600 mg administered over 120 minutes every 8 hours). However, the frequency of rash in the subgroup of Asian patients receiving Zinforo every 8 hours was very common (18.5%).

Paediatric population

The safety assessment in paediatric patients is based on the safety data from 2 trials in which 227 patients aged from 2 months to 17 years with cSSTI or CAP received Zinforo. Overall, the safety profile in these 227 patients was similar to that observed in the adult population.

In addition, the safety assessment in neonates is based on the safety data from 2 trials in which 34 patients (age range from birth to less than 60 days) received Zinforo; 23 of these patients received only a single dose of Zinforo. Overall, the adverse events reported in these studies were consistent with the known safety profile for Zinforo.

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.

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