Gabrail, N., Yanagihara, R., Spaczynski, M., Cooper, W., O'Boyle, E., Smith, C., & Boccia, R. (2015). Pharmacokinetics, safety, and efficacy of APF530 (extended-release granisetron) in patients receiving moderately or highly emetogenic chemotherapy: Results of two phase II trials. Cancer Management and Research, 7, 83-92.
To determine the pharmacokinetics, safety, and efficacy of two dosing regimens of APF530
There were two separate studies reported in this paper. The first study included 45 patients and used three escalating dosing schedules of 250 mg, 500 mg, or 750 mg. The second study included 35 patients with two dosing schedules of 250 or 500 mg. Safety and efficacy were reported. Drug levels were measured from predose to 168 hours after administration. Doses were given via subcutaneous injection in the abdomen prior to chemotherapy. All patients also received dexamethasone.
Prospective
Both studies met the primary objective by defining pharmacokinetics. Adverse events did not appear to be dose-related. Most were mild to moderate and were unrelated to the study drug. Injection site reactions were low and were not associated with dosing, and 17.7% of erythema was reported in the 250 mg arm. No erythema was reported in the 750 mg arm. The plasma concentrations of granisetron were maintained for seven days with a single dose of the drug. Preliminary data demonstrated another option for the prevention of acute and delayed chemotherapy-induced nausea and vomiting. Patients treated with APF530 at 250 or 500 mg obtained complete response 83% of the time in the acute-onset and delayed-onset phases. Complete control was obtained in 76%. Nausea was controlled almost as well as emesis. Nausea reports were mostly mild.
Granisetron exposure was maintained for seven days with a single dose of subcutaneous AFP530. Mild injection site irritation was noted. Nausea was mild, and nausea and vomiting were controlled in the acute and delayed phases.
This could be another option for treating chemotherapy-induced nausea and vomiting, but it is possible that this treatment causes unnecessary discomfort when oral and transdermal approaches are available. This is very preliminary data, and the study did not compare this treatment to standard care. Additional research to determine the usefulness of this drug for chemotherapy-induced nausea and vomiting is needed.