Metastatic Breast Cancer
Table 6 shows the frequency of important adverse reactions in the randomized comparative trial for the patients who received either single-agent paclitaxel protein-bound particles for injectable suspension (albumin-bound) or paclitaxel injection for the treatment of metastatic breast cancer.
Other Adverse Reactions
Hematologic Disorders
Neutropenia was dose dependent and reversible. Among patients with metastatic breast cancer in the randomized trial, neutrophil counts declined below 500 cells/mm
Infections
Infectious episodes were reported in 24% of the patients treated with paclitaxel protein-bound particles for injectable suspension (albumin-bound). Oral candidiasis, respiratory tract infections and pneumonia were the most frequently reported infectious complications.
Hypersensitivity Reactions (HSRs)
Grade 1 or 2 HSRs occurred on the day of paclitaxel protein-bound particles for injectable suspension (albumin-bound) administration and consisted of dyspnea (1%) and flushing, hypotension, chest pain, and arrhythmia (all <1%). The use of paclitaxel protein-bound particles for injectable suspension (albumin-bound) in patients previously exhibiting hypersensitivity to paclitaxel injection or human albumin has not been studied.
Cardiovascular
Hypotension, during the 30-minute infusion, occurred in 5% of patients. Bradycardia, during the 30-minute infusion, occurred in <1% of patients. These vital sign changes most often caused no symptoms and required neither specific therapy nor treatment discontinuation.
Severe cardiovascular events possibly related to single-agent paclitaxel protein-bound particles for injectable suspension (albumin-bound) occurred in approximately 3% of patients. These events included cardiac ischemia/infarction, chest pain, cardiac arrest, supraventricular tachycardia, edema, thrombosis, pulmonary thromboembolism, pulmonary emboli, and hypertension. Cases of cerebrovascular attacks (strokes) and transient ischemic attacks have been reported.
Electrocardiogram (ECG) abnormalities were common among patients at baseline. ECG abnormalities on study did not usually result in symptoms, were not dose-limiting, and required no intervention. ECG abnormalities were noted in 60% of patients. Among patients with a normal ECG prior to study entry, 35% of all patients developed an abnormal tracing while on study. The most frequently reported ECG modifications were non-specific repolarization abnormalities, sinus bradycardia, and sinus tachycardia.
Respiratory
Dyspnea (12%), cough (7%), and pneumothorax (<1%) were reported after treatment with paclitaxel protein-bound particles for injectable suspension (albumin-bound).
Neurologic
The frequency and severity of sensory neuropathy increased with cumulative dose. Sensory neuropathy was the cause of paclitaxel protein-bound particles for injectable suspension (albumin‑bound) discontinuation in 7/229 (3%) patients. Twenty-four patients (10%) treated with paclitaxel protein-bound particles for injectable suspension (albumin-bound) developed Grade 3 peripheral neuropathy; of these patients, 14 had documented improvement after a median of 22 days; 10 patients resumed treatment at a reduced dose of paclitaxel protein-bound particles for injectable suspension (albumin-bound) and 2 discontinued due to peripheral neuropathy. Of the 10 patients without documented improvement, 4 discontinued the study due to peripheral neuropathy.
No Grade 4 sensory neuropathies were reported. Only one incident of motor neuropathy (Grade 2) was observed in either arm of the controlled trial.
Vision Disorders
Ocular/visual disturbances occurred in 13% of all patients (n=366) treated with paclitaxel protein‑bound particles for injectable suspension (albumin-bound) and 1% were severe. The severe cases (keratitis and blurred vision) were reported in patients who received higher doses than those recommended (300 or 375 mg/m
Arthralgia/Myalgia
The symptoms were usually transient, occurred two or three days after paclitaxel protein-bound particles for injectable suspension (albumin-bound) administration, and resolved within a few days.
Hepatic
Grade 3 or 4 elevations in GGT were reported for 14% of patients treated with paclitaxel protein‑bound particles for injectable suspension (albumin-bound) and 10% of patients treated with paclitaxel injection in the randomized trial.
Renal
Overall 11% of patients experienced creatinine elevation, 1% severe. No discontinuations, dose reductions, or dose delays were caused by renal toxicities.
Other Clinical Events
Nail changes (changes in pigmentation or discoloration of nail bed) have been reported. Edema occurred in 10% of patients; no patients had severe edema. Dehydration and pyrexia were also reported.
Non-Small Cell Lung Cancer
Adverse reactions were assessed in 514 paclitaxel protein-bound particles for injectable suspension (albumin-bound)/carboplatin-treated patients and 524 paclitaxel injection/carboplatin-treated patients receiving first-line systemic treatment for locally advanced (stage IIIB) or metastatic (IV) non-small cell lung cancer (NSCLC) in a multicenter, randomized, open-label trial. Paclitaxel protein-bound particles for injectable suspension (albumin-bound) was administered as an intravenous infusion over 30 minutes at a dose of 100 mg/m
The differences in paclitaxel dose and schedule between the two arms limit direct comparison of dose- and schedule-dependent adverse reactions. Among patients evaluable for adverse reactions, the median age was 60 years, 75% were men, 81% were White, 49% had adenocarcinoma, 43% had squamous cell lung cancer, 76% were ECOG PS 1. Patients in both treatment arms received a median of 6 cycles of treatment.
The following common (≥ 10% incidence) adverse reactions were observed at a similar incidence in paclitaxel protein-bound particles for injectable suspension (albumin-bound) plus carboplatin-treated and paclitaxel injection plus carboplatin-treated patients: alopecia 56%, nausea 27%, fatigue 25%, decreased appetite 17%, asthenia 16%, constipation 16%, diarrhea 15%, vomiting 12%, dyspnea 12%, and rash 10% (incidence rates are for the paclitaxel protein-bound particles for injectable suspension (albumin-bound) plus carboplatin treatment group).
Table 7 provides the frequency and severity of laboratory-detected abnormalities which occurred with a difference of ≥ 5% for all grades (1-4) or ≥ 2% for Grade 3-4 toxicity between paclitaxel protein-bound particles for injectable suspension (albumin-bound) plus carboplatin-treated patients or paclitaxel injection plus carboplatin-treated patients.
Table 8 provides the frequency and severity of adverse reactions, which occurred with a difference of ≥ 5% for all grades (1-4) or ≥ 2% for Grade 3-4 between either treatment group for the 514 paclitaxel protein-bound particles for injectable suspension (albumin-bound) plus carboplatin-treated patients compared with the 524 patients who received paclitaxel injection plus carboplatin.
For the paclitaxel protein-bound particles for injectable suspension (albumin-bound) plus carboplatin treated group, 17/514 (3%) patients developed Grade 3 peripheral neuropathy and no patients developed Grade 4 peripheral neuropathy. Grade 3 neuropathy improved to Grade 1 or resolved in 10/17 patients (59%) following interruption or discontinuation of paclitaxel protein-bound particles for injectable suspension (albumin-bound).
Adenocarcinoma of the Pancreas
Adverse reactions were assessed in 421 patients who received paclitaxel protein-bound particles for injectable suspension (albumin-bound) plus gemcitabine and 402 patients who received gemcitabine for the first-line systemic treatment of metastatic adenocarcinoma of the pancreas in a multicenter, multinational, randomized, controlled, open-label trial. Patients received a median treatment duration of 3.9 months in the paclitaxel protein-bound particles for injectable suspension (albumin-bound)/gemcitabine group and 2.8 months in the gemcitabine group. For the treated population, the median relative dose intensity for gemcitabine was 75% in the paclitaxel protein-bound particles for injectable suspension (albumin-bound)/gemcitabine group and 85% in the gemcitabine group. The median relative dose intensity of paclitaxel protein-bound particles for injectable suspension (albumin-bound) was 81%.
Table 9 provides the frequency and severity of laboratory-detected abnormalities which occurred at a higher incidence for Grades 1-4 (≥ 5%) or for Grade 3-4 (≥ 2%) toxicity in paclitaxel protein-bound particles for injectable suspension (albumin-bound) plus gemcitabine-treated patients.
Table 10 provides the frequency and severity of adverse reactions which occurred with a difference of ≥ 5% for all grades or ≥ 2% for Grade 3 or higher in the paclitaxel protein-bound particles for injectable suspension (albumin-bound) plus gemcitabine-treated group compared to the gemcitabine group.
Additional clinically relevant adverse reactions that were reported in < 10% of the patients with adenocarcinoma of the pancreas who received paclitaxel protein-bound particles for injectable suspension (albumin-bound)/gemcitabine included:
Infections & infestations: oral candidiasis, pneumonia
Vascular disorders: hypertension
Cardiac disorders: tachycardia, congestive cardiac failure
Eye disorders: cystoid macular edema
Peripheral Neuropathy
Grade 3 peripheral neuropathy occurred in 17% of patients who received paclitaxel protein-bound particles for injectable suspension (albumin-bound)/gemcitabine compared to 1% of patients who received gemcitabine only; no patients developed Grade 4 peripheral neuropathy. The median time to first occurrence of Grade 3 peripheral neuropathy in the paclitaxel protein-bound particles for injectable suspension (albumin-bound) arm was 140 days. Upon suspension of paclitaxel protein-bound particles for injectable suspension (albumin-bound) dosing, the median time to improvement from Grade 3 peripheral neuropathy to ≤ Grade 1 was 29 days. Of paclitaxel protein-bound particles for injectable suspension (albumin-bound)-treated patients with Grade 3 peripheral neuropathy, 44% resumed paclitaxel protein-bound particles for injectable suspension (albumin-bound) at a reduced dose.
Sepsis
Sepsis occurred in 5% of patients who received paclitaxel protein-bound particles for injectable suspension (albumin-bound)/gemcitabine compared to 2% of patients who received gemcitabine alone. Sepsis occurred both in patients with and without neutropenia. Risk factors for sepsis included biliary obstruction or presence of biliary stent.
Pneumonitis
Pneumonitis occurred in 4% of patients who received paclitaxel protein-bound particles for injectable suspension (albumin-bound)/gemcitabine compared to 1% of patients who received gemcitabine alone. Two of 17 patients in the paclitaxel protein-bound particles for injectable suspension (albumin-bound) arm with pneumonitis died.