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Cubicin

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Cubicin

Side Effects
Interactions

SIDE EFFECTS

The following adverse reactions are described, or described in greater detail, in other sections:

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared with rates in the clinical trials of another drug and may not reflect the rates observed in practice.

Clinical Trials Experience

Clinical trials enrolled 1,864 patients treated with CUBICIN and 1,416 treated with comparator.

Complicated Skin And Skin Structure Infection Trials

In Phase 3 complicated skin and skin structure infection (cSSSI) trials, CUBICIN was discontinued in 15/534 (2.8%) patients due to an adverse reaction, while comparator was discontinued in 17/558 (3.0%) patients.

The rates of the most common adverse reactions, organized by body system, observed in cSSSI (4 mg/kg CUBICIN) patients are displayed in Table 4.

Table 4: Incidence of Adverse Reactions that Occurred in ≥ 2% of Patients in the CUBICIN Treatment Group and ≥ the Comparator Treatment Group in Phase 3 cSSSI Trials

Adverse Reaction Patients (%)
CUBICIN 4 mg/kg
(N=534)
Comparator*
(N=558)
Gastrointestinal disorders
  Diarrhea 5.2 4.3
Nervous system disorders
  Headache 5.4 5.4
  Dizziness 2.2 2
Skin/subcutaneous disorders
  Rash 4.3 3.8
Diagnostic investigations
  Abnormal liver function tests 3 1.6
  Elevated CPK 2.8 1.8
Infections
  Urinary tract infections 2.4 0.5
Vascular disorders
  Hypotension 2.4 1.4
Respiratory disorders
  Dyspnea 2.1 1.6
* Comparator: vancomycin (1 g IV q12h) or an anti-staphylococcal semi-synthetic penicillin (i.e., nafcillin, oxacillin, cloxacillin, or flucloxacillin; 4 to 12 g/day IV in divided doses).

Drug-related adverse reactions (possibly or probably drug-related) that occurred in < 1% of patients receiving CUBICIN in the cSSSI trials are as follows:

Body as a Whole: fatigue, weakness, rigors, flushing, hypersensitivity

Blood/Lymphatic System: leukocytosis, thrombocytopenia, thrombocytosis, eosinophilia, increased International Normalized Ratio (INR)

Cardiovascular System: supraventricular arrhythmia

Dermatologic System: eczema

Digestive System: abdominal distension, stomatitis, jaundice, increased serum lactate dehydrogenase

Metabolic/Nutritional System: hypomagnesemia, increased serum bicarbonate, electrolyte disturbance

Musculoskeletal System: myalgia, muscle cramps, muscle weakness, arthralgia

Nervous System: vertigo, mental status change, paresthesia

Special Senses: taste disturbance, eye irritation

S. aureus Bacteremia/Endocarditis Trial

In the S. aureus bacteremia/endocarditis trial, CUBICIN was discontinued in 20/120 (16.7%) patients due to an adverse reaction, while comparator was discontinued in 21/116 (18.1%) patients.

Serious Gram-negative infections (including bloodstream infections) were reported in 10/120 (8.3%) CUBICIN-treated patients and 0/115 comparator-treated patients. Comparator-treated patients received dual therapy that included initial gentamicin for 4 days. Infections were reported during treatment and during early and late follow-up. Gram-negative infections included cholangitis, alcoholic pancreatitis, sternal osteomyelitis/mediastinitis, bowel infarction, recurrent Crohn's disease, recurrent line sepsis, and recurrent urosepsis caused by a number of different Gram-negative bacteria.

The rates of the most common adverse reactions, organized by System Organ Class (SOC), observed in S. aureus bacteremia/endocarditis (6 mg/kg CUBICIN) patients are displayed in Table 5.

Table 5: Incidence of Adverse Reactions that Occurred in ≥ 5% of Patients in the CUBICIN Treatment Group and ≥ the Comparator Treatment Group in the S. aureus Bacteremia/Endocarditis Trial

Adverse Reaction* Patients n (%)
CUBICIN 6 mg/kg
(N=120)
Comparator†
(N=116)
Infections and infestations
  Sepsis NOS 6 (5%) 3 (3%)
  Bacteremia 6 (5%) 0 (0%)
Gastrointestinal disorders
  Abdominal pain NOS 7 (6%) 4 (3%)
General disorders and administration site conditions
  Chest pain 8 (7%) 7 (6%)
  Edema NOS 8 (7%) 5 (4%)
Respiratory, thoracic and mediastinal disorders
  Pharyngolaryngeal pain 10 (8%) 2 (2%)
Skin and subcutaneous tissue disorders
  Pruritus 7 (6%) 6 (5%)
  Sweating increased 6 (5%) 0 (0%)
Psychiatric disorders
  Insomnia 11 (9%) 8 (7%)
Investigations
  Blood creatine phosphokinase increased 8 (7%) 1 (1%)
Vascular disorders
  Hypertension NOS 7 (6%) 3 (3%)
* NOS, not otherwise specified.
† Comparator: vancomycin (1 g IV q12h) or an anti-staphylococcal semi-synthetic penicillin (i.e., nafcillin, oxacillin, cloxacillin, or flucloxacillin; 2 g IV q4h), each with initial low-dose gentamicin.

The following reactions, not included above, were reported as possibly or probably drug-related in the CUBICIN-treated group:

Blood and Lymphatic System Disorders: eosinophilia, lymphadenopathy, thrombocythemia, thrombocytopenia

Cardiac Disorders: atrial fibrillation, atrial flutter, cardiac arrest

Ear and Labyrinth Disorders: tinnitus

Eye Disorders: vision blurred

Gastrointestinal Disorders: dry mouth, epigastric discomfort, gingival pain, hypoesthesia oral

Infections and Infestations: candidal infection NOS, vaginal candidiasis, fungemia, oral candidiasis, urinary tract infection fungal

Investigations: blood phosphorous increased, blood alkaline phosphatase increased, INR increased, liver function test abnormal, alanine aminotransferase increased, aspartate aminotransferase increased, prothrombin time prolonged

Metabolism and Nutrition Disorders: appetite decreased NOS

Musculoskeletal and Connective Tissue Disorders: myalgia

Nervous System Disorders: dyskinesia, paresthesia

Psychiatric Disorders: hallucination NOS

Renal and Urinary Disorders: proteinuria, renal impairment NOS

Skin and Subcutaneous Tissue Disorders: pruritus generalized, rash vesicular

Other Trials

In Phase 3 trials of community-acquired pneumonia (CAP), the death rate and rates of serious cardiorespiratory adverse events were higher in CUBICIN-treated patients than in comparator-treated patients. These differences were due to lack of therapeutic effectiveness of CUBICIN in the treatment of CAP in patients experiencing these adverse events [see INDICATIONS AND USAGE].

Laboratory Changes

Complicated Skin and Skin Structure Infection Trials

In Phase 3 cSSSI trials of CUBICIN at a dose of 4 mg/kg, elevations in CPK were reported as clinical adverse events in 15/534 (2.8%) CUBICIN-treated patients, compared with 10/558 (1.8%) comparator-treated patients. Of the 534 patients treated with CUBICIN, 1 (0.2%) had symptoms of muscle pain or weakness associated with CPK elevations to greater than 4 times the upper limit of normal (ULN). The symptoms resolved within 3 days and CPK returned to normal within 7 to 10 days after treatment was discontinued [see WARNINGS AND PRECAUTIONS]. Table 6 summarizes the CPK shifts from Baseline through End of Therapy in the cSSSI trials.

Table 6: Incidence of CPK Elevations from Baseline during Therapy in Either the CUBICIN Treatment Group or the Comparator Treatment Group in Phase 3 cSSSI Trials

Change in CPK All Patients Patients with Normal CPK at Baseline
CUBICIN 4 mg/kg (N=430) Comparator* (N=459) CUBICIN 4 mg/kg (N=374) Comparator* (N=392)
% n % n % n % n
No Increase 90.7 390 91.1 418 91.2 341 91.1 357
Maximum Value > 1 ULN† 9.3 40 8.9 41 8.8 33 8.9 35
> 2 ULN 4.9 21 4.8 22 3.7 14 3.1 12
> 4 ULN 1.4 6 1.5 7 1.1 4 1.0 4
> 5 ULN 1.4 6 0.4 2 1.1 4 0.0 0
> 10 ULN 0.5 2 0.2 1 0.2 1 0.0 0
Note: Elevations in CPK observed in patients treated with CUBICIN or comparator were not clinically or statistically significantly different.
* Comparator: vancomycin (1 g IV q12h) or an anti-staphylococcal semi-synthetic penicillin (i.e., nafcillin, oxacillin, cloxacillin, or flucloxacillin; 4 to 12 g/day IV in divided doses).
† ULN (Upper Limit of Normal) is defined as 200 U/L.

S. aureus Bacteremia/Endocarditis Trial

In the S. aureus bacteremia/endocarditis trial, at a dose of 6 mg/kg, 11/120 (9.2%) CUBICIN-treated patients, including two patients with baseline CPK levels > 500 U/L, had CPK elevations to levels > 500 U/L, compared with 1/116 (0.9%) comparator-treated patients. Of the 11 CUBICIN-treated patients, 4 had prior or concomitant treatment with an HMG-CoA reductase inhibitor. Three of these 11 CUBICIN-treated patients discontinued therapy due to CPK elevation, while the one comparator-treated patient did not discontinue therapy [see WARNINGS AND PRECAUTIONS].

Post-Marketing Experience

The following adverse reactions have been identified during postapproval use of CUBICIN. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to estimate their frequency reliably or establish a causal relationship to drug exposure.

Immune System Disorders: anaphylaxis; hypersensitivity reactions, including angioedema, drug rash with eosinophilia and systemic symptoms (DRESS), pruritus, hives, shortness of breath, difficulty swallowing, truncal erythema, and pulmonary eosinophilia [see CONTRAINDICATIONS, WARNINGS AND PRECAUTIONS]

Infections and Infestations: Clostridium difficile–associated diarrhea [see WARNINGS AND PRECAUTIONS]

Musculoskeletal Disorders: myoglobin increased; rhabdomyolysis (some reports involved patients treated concurrently with CUBICIN and HMG-CoA reductase inhibitors) [see WARNINGS AND PRECAUTIONS, DRUG INTERACTIONS, and CLINICAL PHARMACOLOGY]

Respiratory, Thoracic, and Mediastinal Disorders: cough, eosinophilic pneumonia [see WARNINGS AND PRECAUTIONS]

Nervous System Disorders: peripheral neuropathy [see WARNINGS AND PRECAUTIONS]

Skin and Subcutaneous Tissue Disorders: serious skin reactions, including Stevens-Johnson syndrome and vesiculobullous rash (with or without mucous membrane involvement)

Gastrointestinal Disorders: nausea, vomiting

Read the Cubicin (daptomycin injection) Side Effects Center for a complete guide to possible side effects

DRUG INTERACTIONS

HMG-CoA Reductase Inhibitors

In healthy subjects, concomitant administration of CUBICIN and simvastatin had no effect on plasma trough concentrations of simvastatin, and there were no reports of skeletal myopathy [see CLINICAL PHARMACOLOGY].

However, inhibitors of HMG-CoA reductase may cause myopathy, which is manifested as muscle pain or weakness associated with elevated levels of creatine phosphokinase (CPK). In the Phase 3 S. aureus bacteremia/endocarditis trial, some patients who received prior or concomitant treatment with an HMG-CoA reductase inhibitor developed elevated CPK [see ADVERSE REACTIONS]. Experience with the coadministration of HMG-CoA reductase inhibitors and CUBICIN in patients is limited; therefore, consideration should be given to suspending use of HMG-CoA reductase inhibitors temporarily in patients receiving CUBICIN.

Drug-Laboratory Test Interactions

Clinically relevant plasma concentrations of daptomycin have been observed to cause a significant concentration-dependent false prolongation of prothrombin time (PT) and elevation of International Normalized Ratio (INR) when certain recombinant thromboplastin reagents are utilized for the assay. The possibility of an erroneously elevated PT/INR result due to interaction with a recombinant thromboplastin reagent may be minimized by drawing specimens for PT or INR testing near the time of trough plasma concentrations of daptomycin. However, sufficient daptomycin concentrations may be present at trough to cause interaction.

If confronted with an abnormally high PT/INR result in a patient being treated with CUBICIN, it is recommended that clinicians:

  1. Repeat the assessment of PT/INR, requesting that the specimen be drawn just prior to the next CUBICIN dose (i.e., at trough concentration). If the PT/INR value obtained at trough remains substantially elevated above what would otherwise be expected, consider evaluating PT/INR utilizing an alternative method.
  2. Evaluate for other causes of abnormally elevated PT/INR results.

Read the Cubicin Drug Interactions Center for a complete guide to possible interactions

Last reviewed on RxList: 12/9/2013
This monograph has been modified to include the generic and brand name in many instances.

Side Effects
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