Introduction

In 2004, an expert international panel convened in Perugia, Italy to discuss various issues involving chemotherapy-induced nausea and vomiting (CINV) and develop consensus statements [1]. This paper briefly will describe those previous deliberations, as well as add pertinent new information since the 2005 publication. As with the previous studies, guidelines are possible with 5-day cisplatin combination chemotherapy in germ cell tumors based upon phase III studies. However, there are no sufficiently powered studies to generate similar statements for the other additional topics in this paper. Guideline updates that provide no new evidence, but no change to recommendations, do not require substantial textural change [2].

Multiple-day chemotherapy

In adult oncology, there are adequate data to provide guidelines for clinical utility in patients receiving 5-day cisplatin combination chemotherapy in testicular cancer [1]. There are other regimens utilizing multiple-day chemotherapy such as ifosfamide or actinomycin-D, especially in a pediatric setting. However, there is a paucity of even phase II data in this setting to make any therapeutic recommendation.

Prior to the introduction of ondansetron, the first 5-HT3 receptor antagonist, the typical testicular patient would experience 10 emetic episodes on day 1, 5 on day 2, and decreasing emesis on succeeding days [3]. This trend has now actually been reversed with increasing nausea and vomiting on days 3–5, and few, if any, patients are being subjected to the very severe CINV of those earlier days.

The first phase II study of single agent ondansetron in this setting studied 35 patients, of whom 24 were chemo-naive [4]. Ten patients (29%) had no emesis and 18 (51%), two or few episodes during the duration of therapy, with highest rate of complete protection (77%) seen on day 1. Subsequent phase III studies documented the value of adding dexamethasone [5] and the superiority of ondansetron to metoclopramide [6].

Palonosetron is a second-generation 5-HT3 receptor antagonist with a prolonged half-life. A phase II study evaluated palonosetron 0.25 mg intravenously on days 1, 3, and 5 combined with dexamethasone 20 mg on days 1 and 2, followed by single agent dexamethasone 8 mg bid on days 6 and 7, and 4 mg bid on day 8. Forty patients received bleomycin + etoposide + cisplatin (BEP) and a single patient EP. Fifty-one percent of patients had no emesis throughout days 1–5 and 83% no delayed emesis days 6–9. The median total duration of nausea of any intensity was 16 h (primarily mild) over the 216-h study period. Patients reported little interference with daily function as a result of nausea. Eighty-eight percent of patients had no emesis on days 1–2, the days of co-administration of dexamethasone, compared to 83%, 68%, and 71% on days 3–5. It is of interest to note that no prophylactic antiemetics were given on day 4 of cisplatin, and yet 68% had no emesis [7].

There are very few data on newer agents such as NK-1 receptor antagonists. A phase II study evaluated granisetron plus dexamethasone plus oral aprepitant (125 mg orally on day 1 and 80 mg on each subsequent day of chemotherapy and for two additional days). Thirty-eight patients received highly emetogenic (germ cell tumors or sarcoma) and 40 moderate emetogenic chemotherapy with multiple diagnoses and treatment regimens. The usage of aprepitant did not reveal any new or unexpected safety signals for the 5–7-day course [8]. A phase III double-blinded study of aprepitant is ongoing. Preliminary results also indicated no unique toxicity problems with aprepitant on days 3–7 [9].

The optimal duration of dexamethasone (combined with a 5-HT3 receptor antagonist) is unknown. More severe CINV was noted on days 4 and 5 compared to days 1 and 2 in several studies in which the dexamethasone was given only on the first 2 days of cisplatin combination chemotherapy [5, 7]. Whether this reflects delayed CINV from days 1 and 2 is unknown. Other investigators have evaluated ondansetron plus dexamethasone 20 mg intravenously on each of the 5 days of cisplatin, and a similar trend was noted. There was no emesis in 100%, 88%, 67%, 67%, and 73% of 24 patients on days 1–5, respectively. Twenty-five to 29% of patients had three or more emetic episodes on days 3–5, despite the daily administration of both ondansetron and dexamethasone [10]. The side effects of five consecutive days of dexamethasone followed by three additional dosages on days 6–8 for delayed nausea and vomiting and repeated courses every 3 weeks for three to four courses are often underreported and not necessarily trivial. Vardy et al. prospectively evaluated dexamethasone toxicity for prophylaxis of delayed emesis in 60 patients receiving moderately emetogenic chemotherapy. Patients reported moderate to severe problems with insomnia (45%), indigestion or epigastric discomfort (27%), agitation (27%), weight gain (16%), and acne (15%) [11]. Of more concern was the potential for late toxicity from dexamethasone. Four of 47 patients (9%) with testicular cancer developed avascular necrosis of the hip [12]. Similar complications have been noted in our testicular cancer population at Indiana University. Whether this is related to the dexamethasone is conjectural, but suggestive.

Guidelines

Patients receiving multiple-day cisplatin should receive a 5-HT3 receptor antagonist plus dexamethasone for acute nausea and vomiting and dexamethasone for delayed nausea and vomiting.

  • MASCC level of confidence: high

  • MASCC level of consensus: unanimous

  • ESMO level of evidence: II

  • ESMO grade of recommendation: A

High-dose chemotherapy

There are still very few data on the effective use of modern antiemetics for patients treated with high-dose chemotherapy with stem cell support. Most are phase II studies of a 5-HT3 receptor antagonist alone or combined with dexamethasone. One of the major problems is that nausea and vomiting is due to multiple causes, including prophylactic antibiotics, narcotic analgesics that are used for mucositis, as well as the chemotherapy-induced nausea and vomiting. The use of total-body irradiation can be a confounding factor. Cross-comparison of studies is difficult due to the varied regimens and different patient populations and tumor types. Additionally, there is a variety of high-dose chemotherapy regimens administered over consecutive days. Most patients have experienced emesis with prior chemotherapy or irradiation. These are not only real clinical problems in emesis control, but there are confounding factors that make clinical research in this area, and comparison between different studies is extremely difficult.

There is very little information on the natural history of chemotherapy-induced nausea and vomiting in patients undergoing high-dose chemotherapy and stem cell transplantation. In a prospective evaluation of 82 patients undergoing high-dose chemotherapy with stem cell transplantation by Ballen et al., antiemetic prophylaxis consisted of at least a 5HT-3 receptor antagonist and steroids. In this study, the most common chemotherapy regimen was cyclophosphamide/etoposide/BCNU used in lymphoma patients (29%), followed by thiotepa/melphalan/cyclophosphamide for myeloma patients (15%). Twenty-six patients (32%) received an allograft, six from an unrelated donor and 20 from a sibling donor; 56 patients (68%) received an autograft. The study showed the antiemetic outcome as follows: 95% of patients had nausea during the first week of treatment, and 80% of the patients had at least one emetic episode. The percentage of patients with emesis was as follows: day 1, 13%; day 2, 21%; day 3, 30%; day 4, 38%; day 5, 44%; day 6, 39%; day 7, 18%. In multivariate analysis, gender, emesis with prior chemotherapy, history of morning or motion sickness, type of transplant (auto vs. allo), use of total-body irradiation, or use of dexamethasone did not impact emesis control [13].

Similar findings were reported in an observational study in 100 consecutive transplant patients. In this trial, Lopez-Jimenez et al. reported a CR rate in only 20% of patients with the usage of 5-HT3 receptor antagonists [14].

Mandanas et al. reported a randomized phase III study in 197 patients with a variety of tumor types including breast cancer, and Hodgkin’s and non-Hodgkin’s lymphoma receiving a variety of high-dose chemotherapy regimens. Patients were randomized to either dolasetron IV on day 1 and a single dose orally 8–12 h later or ondansetron IV on day 1 followed by a single oral dose of 8 mg 8–12 h later. The CR rate was 45.7% and 46.9%, respectively. The authors concluded that dolasetron and ondansetron are equally safe and effective in this setting [15].

Paul et al. conducted a phase II trial with high-dose chemotherapy and stem cell transplantation in 42 patients to evaluate the efficacy of a triple therapy regimen consisting of a 5-HT3 receptor antagonist, aprepitant, and dexamethasone. The CR rate was 42.9% [16].

Musso et al. studied the usage of palonosetron plus dexamethasone in 134 patients treated with high-dose chemotherapy and autologous stem cell transplantation for hematological malignancies. In this trial, dexamethasone was administered throughout the entire treatment period. CR rate was only 36%; however, 50% of the patients were retreated with palonosetron for breakthrough emesis and were successfully rescued [17].

In summary, it is apparent that the control of nausea and vomiting with high-dose chemotherapy and stem cell transplantation remains a challenge. Few randomized trials have been done in the setting of high-dose chemotherapy. These trials are underpowered and use different end points compared to the standard antiemetic trials, making study comparison as well as interpretation very difficult. Recommendations are based on phase II studies performed in patients with a variety of different risk factors, tumor types, and different preparatory regimens or underpowered phase III trials. Delayed emesis appears to be a major problem, and only a few studies have been reported with the usage of aprepitant. Standard therapy appears to be a 5-HT3 receptor antagonist with dexamethasone with or without aprepitant.

Refractory emesis and rescue antiemetics

Antiemetics are most effective when used prophylactically since emesis in progress is much more difficult to suppress and raises the specter of an added component of anticipatory nausea or vomiting on future treatment cycles. It is therefore preferable to use maximally effective antiemetics as first-line therapy rather than withholding more effective antiemetics for later use or use at the time of antiemetic failure. If vomiting continues to occur even with the use of a maximally effective antiemetic regimen, then alternative non-chemotherapy-related causes of nausea and vomiting, such as bowel obstruction, increased intracranial pressure, renal failure, sepsis, electrolyte imbalance, or concomitant medications must be considered.

There are very few large studies of rescue antiemetic therapy for chemotherapy-induced emesis. Much of the literature in this area consists of exploratory studies of therapy for refractory emesis, defined as additional treatment with a new antiemetic strategy in later cycles for patients in whom nausea or vomiting appeared during a first cycle of chemotherapy in spite of standard antiemetic treatment. Both pharmacologic interventions, such as cannabinoids and olanzapine [18], and non-pharmacologic interventions, such as electroacupuncture [19], have had suggestions of activity when evaluated in this manner. Several of the present major antiemetics were also tested as therapy for refractory emesis at the time of their introduction. Ondansetron has shown activity in patients with emesis refractory to other antiemetics [20]. Route of administration may play a role, with the oral route more effective for ondansetron than the intramuscular route [21]. In general, however, rotation of antiemetics within a given family of antiemetic agents would be unlikely to lead to additional benefit. Recent data suggesting that the mechanism of action of palonosetron may differ from that of other serotonin antagonists [22] could provide a rationale for additional activity with this agent. More recently, several studies [23, 24] have documented antiemetic activity of the NK-1 antagonists in patients who did not achieve complete protection from emesis when treated with dexamethasone and a serotonin receptor antagonist alone.

Although the availability of antiemetics for the treatment of refractory emesis is gratifying, the logical strategy would be to include such agents in first-line prophylactic antiemetic regimens so that rescue therapy would not be necessary. Future studies will concentrate on identifying the most efficient and cost-effective strategies for using newer antiemetics to achieve this goal.