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However, chemotherapy administered from days 7 to 14 could have affected the assessment of AEs in the second week of the study. In C2007-01, six of 35 enrolled patients did not meet the study entry criteria because of their age or participation in another trial [https://en.wikipedia.org/wiki/RecBCD RecBCD] within 30 days; these were considered minor deviations unlikely to affect the study outcome. The granisetron transdermal patch (Sancuso?) is another extended-release form of granisetron but is unlike APF530. It is designed to provide extended release of granisetron for up to 7 days. Unlike APF530, the patch is intended for use with multiday chemotherapy regimens and must be applied 24 to 48 hours before the start of chemotherapy because of the time (48 hours) required to reach the granisetron Cmax. The Cmax achieved with the patch is about half that achieved with APF530 250 mg, and the total exposure over 7 days (AUC at 0 to 168 hours) is comparable with that of APF530 250 mg.10,11 Overall, the CR rate was 60% with the patch compared with 65% for oral granisetron.11 Detachment of the patch reduces the amount of granisetron delivered and may be the cause of at least some of the broad variability noted in the pharmacokinetic measurements.10 Interpreting the findings with APF530 SC in the context of granisetron IV is not straightforward because a minimal effective concentration of granisetron in prevention of CINV has not been defined. The recommended dose of granisetron for prevention of CINV is 10 ��g/kg,12 which achieves a Cmax of 4.9 ng/mL.13 In an APF530 Phase I safety and pharmacokinetics study in normal volunteers in [http://www.selleckchem.com/products/crenolanib-cp-868596.html Crenolanib in vitro] which granisetron IV (50 ��g/kg) was used as a control, granisetron concentrations at 24 and 48 hours were 3.67 and 0.890 ng/mL, respectively. Assuming that an effective granisetron concentration is maintained for at least 48 hours, the minimal effective concentration is [http://www.selleckchem.com/screening/anti-diabetic-compound-library.html Anti-diabetic Compound Library cell assay] prolongation of the QTc by 5-HT3 inhibitors resulted in labeling changes regarding potential cardiac safety for granisetron.14 The labeling change was based on individual incidents of QT prolongation.12,15 However, no effect on QTc intervals had been seen in several earlier trials with IV and oral granisetron,16�C20 and a recent study with transdermal granisetron also reported no significant effects on QTc or other ECG variables.13 The effect of high-dose APF530 on the QTc interval (QTc) was assessed in a blinded, placebo-controlled study in normal volunteers with APF530 SC 1,000 mg.