The study is to evaluate the antiemetic effect of adding fosaprepitant to biplet regimen of tropisetron and dexamethasone for patients with cervical cancer or nasopharyngeal cancer treated with radiotherapy and concomitant weekly cisplatin chemotherapy in a south Chinese cohort.

The study was designed as a prospective,randomized, single-blind control clinical trial aiming to assess the efficacy and safety of fosaprepitant combined with tropisetron and dexamethasone in preventing nausea and vomiting during 5 weeks of fractionated radiotherapy and concomitant weekly low-dose cisplatin chemotherapy in patients with cervical cancer or nasopharyngeal cancer.

Inclusion Criteria:

• histologically confirmed nasopharyngeal carcinoma (AJCC 8th stage II-IVa) or cervical cancer (adenocarcinoma, squamous cell carcinoma, or adenosquamous carcinoma, clinical FIGO stage Ib2-IVa;), planning to receive concurrent chemoradiotherapy),18 years or older, with an Eastern Cooperative Oncology Group (ECOG) performance status of 0-1.

Exclusion Criteria:

• took medications with antiemetic effect within 24 hours before initiation of concurrent chemoradiotherapy, had severe systemic diseases (such as uncontrolled diabetes/hypertension) or clinically unstable epileptic seizures require the use of anticonvulsants; allergic to fosaprepitant, tropisetron or dexamethasone.