An analysis of fosaprepitant-induced venous toxicity in patients receiving highly emetogenic chemotherapy.

PURPOSE: Fosaprepitant is an antiemetic used for chemotherapy-induced nausea and vomiting. We recently reported increased infusion site adverse events (ISAE) in a cohort of breast cancer patients receiving chemotherapy with doxorubicin and cyclophosphamide (AC). In this current study, we evaluated the venous toxicity of fosaprepitant use with non-anthracycline platinum-based antineoplastic regimens. METHODS: A retrospective review was conducted of the first 81 patients initiated on fosaprepitant among patients receiving highly emetogenic chemotherapy, on or after January 1, 2011 at Mayo Clinic Rochester. None of these regimens included an anthracycline. Data collected included baseline demographics, chemotherapy regimen, type of intravenous access and type, and severity of ISAE. Data from these patients were compared to previously collected data from patients who had received AC. Statistical analysis using χ 2 and univariate logistic regression was used to evaluate the association between treatment regimen, fosaprepitant, and risk of ISAE. RESULTS: Among these 81 patients, the incidence of ISAE was 7.4% in the non-anthracycline platinum group. The most commonly reported ISAE were swelling (3%), extravasation (3%), and phlebitis (3%). When stratified by regimen, fosaprepitant was associated with a statistically significant increased risk of ISAE in the anthracycline group (OR 8.1; 95% CI 2.0-31.9) compared to the platinum group. CONCLUSIONS: Fosaprepitant antiemetic therapy causes significant ISAE that are appreciably higher than previous reports. Patients receiving platinum-based chemotherapy appear to have less significant ISAE than do patients who receive anthracycline-based regimens.

Antiemetic prescribing practices using a computerized physician order entry system.

PURPOSE: Adherence to guideline-consistent chemotherapy-induced nausea and vomiting (CINV) prophylaxis is suboptimal. The primary aim of this study was to evaluate the magnitude of compliance to institutional guideline-directed antiemetic prophylaxis using a computerized physician order entry system at a single tertiary care institution. A nurse survey was also performed to evaluate how oncology practices, within a cooperative group, managed clinician orders for the prevention of CINV. METHODS: The electronic medical records of 100 consecutive patients were evaluated. The primary endpoint was the incidence of compliance to provide all aspects of scheduled institutional guideline-directed antiemetic prophylaxis for acute (day 1) and delayed (days 2-4) CINV. A descriptive analysis was performed on the convenience sample. Logistic regression was completed to determine the predictors of noncompliance. RESULTS: The incidence of compliance on days 1-4 was 94 %. Half of the noncompliant events (three of six, 50 %) occurred on day 1 alone and involved patients receiving low-emetogenic chemotherapy. There was a high degree of compliance to institutional guidelines for the treatment of delayed CINV (97 %). Patients receiving minimally emetogenic and moderately emetogenic chemotherapy (N = 70) were observed to be 100 % compliant. Patients receiving doxorubicin/cyclophosphamide were numerically less likely to receive institutional guidelines, compared to patients receiving other chemotherapy regimens (OR, 0.24 (0.04, 1.36), p value, 0.05). The nurse survey suggested significant variability amongst the involved institutions with regards to antiemetic prescribing practices. CONCLUSIONS: Computerized physician order entry is associated with impressive adherence to clinician-prescribing practices, according to institutional guidelines, for acute and delayed CINV.