La Ricerca Sugli Antiemetici: Un Modello Italiano Di Successo *

Abstract

At the beginning of the 80's the Italian Group for Clinical Research (G.O.I.R.C.) identified chemotherapy-induced nausea and vomiting as one of the most distressing adverse events, and decided to plan and execute clinical trials on antiemetics in order to reduce this negative impact on patients.

Therefore, some consecutive double-blind randomized trials were conducted on cisplatin-treated patients. The first was a dose-finding study on four different high-doses of domperidone, followed by a study comparing two different high-doses of metoclopramide, and a study comparing the addition of a corticosteroid to high-dose metoclopramide with respect to metoclopramide alone. Finally, a study demonstrating that a combination of a higher dose of metoclopramide (3 mg/kg x2) plus dexamethasone and diphenhydramine was significantly superior with respect to a lower dose of metoclopramide (1 mg/kg x 4) combined with methylprednisolone was carried out.

With the introduction of the 5-HT₃ receptor antagonists the interest for antiemetic therapy increased and other Italian gynecological and medical oncology centres became involved in the antiemetic research. The Italian Group for Antiemetic Research was formed in 90's and its first study demonstrated the superiority of a combination of a 5-HT₃ receptor antagonist plus dexamethasone with respect to the standard three drug combination of high doses of metoclopramide in the prevention of cisplatin-induced acute emesis.

In the following years, the Group contributed to the identification of the best antiemetic prophylaxis for acute emesis induced by moderately emetogenic chemotherapy, and for delayed emesis induced by cisplatin. Also a drug utilization review on antiemetics in clinical practice has recently been carried out.

Today, the interest of the Group is concentrated in studying the optimal antiemetic prophylaxis for delayed emesis induced by moderately emetogenic chemotherapy.

The rules always followed by the Italian Group for Antiemetic Research are: - complete independence of judgement on the efficacy and the tolerability of antiemetic drugs from the pharmaceutical companies; - priority of ethical problems in designing clinical trials; - strict adherence to the methodological problems of antiemetic research and - complete autonomy concerning the study planned, the data computerization and the data elaboration.

In the last twelve years approximately 70 Italian centres have enrolled their patients into the studies of the Italian Group for Antiemetic Research.