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Clinical Trial Summary

This study explores whether a commonly used medication called Pantoprazole can help prevent delayed nausea and vomiting from chemotherapy for early breast cancer.

Delayed nausea, and occasionally vomiting, can occur after breast cancer chemotherapy, affecting quality of life. A potential cause of these delayed side effects is that the chemotherapy may cause stomach irritation. Pantoprazole is commonly used to treat stomach irritation by reducing stomach acid, which may in turn improve nausea and/or vomiting.

Patients undergoing breast cancer chemotherapy before or after primary surgery will be invited to participate in the study. They will be asked how much nausea or vomiting they have with and without Pantoprazole from Day 2 until 5 after they receive chemotherapy. All participants will still receive all of the usual anti-sickness medications, which are very effective in preventing sickness in the first 24 hours after treatment, but not for delayed symptoms.

Information from the study may lead to a change in practice with patients using Pantoprazole to reduce the risks of delayed nausea and vomiting.

Clinical Trial Description

Breast Cancer is the most common cancer type in women in New Zealand and has the second highest mortality (Ministry of Health NZ) Many women with early breast cancer still receive chemotherapy, before or after surgery and delayed nausea is a particular challenge. Ensuring tolerable therapy is critical to improving outcomes, by enabling patients to complete optimal anti-cancer therapy and to improve quality of life during therapy. Despite recent advances in antiemetic regimens, recent trials showed that rates of delayed Chemotherapy-Induced Nausea and Vomiting (CINV) are is in excess of 50%, with significant impacts on quality of life during treatment. This suggests that different mechanisms than those targeted by centrally acting anti-emetics account for such symptoms. There is strong evidence that chemotherapy regimens can result in gastrointestinal mucosal injury and dyspepsia. A number of studies have shown chemotherapy-induced dyspepsia can be relieved by a proton pump inhibitor, but none have reported their use as prophylaxis for delayed CINV, which may be a linked symptom. Proton pump inhibitors are widely used in the treatment of non-malignant dyspeptic conditions and are the most potent medications at reducing gastric acid secretions. They are considered safe in short-term use and are commonly used in clinical practice in cancer patients as well as the wider population. The pharmacokinetics Pantoprazole make it the ideal PPI for this study. The experience of New Zealand Medical Oncologists is that delayed nausea is often completely resolved by the delayed use of a PPI when symptoms occur. In this study we hope to see a 30% difference in the rates of delayed nausea by using a drug which is readily available and of very low cost. This will be the first time it has been used as preventive therapy in this setting. If this benefit occurs, it would significantly improve the treatment journey and may improve compliance to anti-cancer therapies. ;

Study Design

Related Conditions & MeSH terms

NCT number NCT03948477
Study type Interventional
Source University of Auckland, New Zealand
Contact Louise Clement, MA
Phone +64 (0)99234626
Status Not yet recruiting
Phase Phase 2
Start date May 14, 2019
Completion date July 15, 2021

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