Colorectal cancer is one of the most common malignancies diagnosed in Canada. Currently, adjuvant colorectal cancer treatment primarily includes chemotherapeutic regimens such as FOLFOX6 (5-fluorouracil, leucovorin, oxaliplatin) or CAPOX (capecitabine, oxaliplatin), as well as alternative regimens such as TOMOX (raltitrexed, oxaliplatin). However, the prevalence of drug shortages in today’s society may make these preferred regimens inaccessible. The purpose of this case report is to highlight the tolerability of an alternative adjuvant regimen (pemetrexed plus oxaliplatin) that has undergone both phase I and II clinical trials for the treatment of colorectal cancer. The patient presented in this case report is a 57-year-old female diagnosed with Stage III colon cancer. This patient received seven cycles of pemetrexed plus oxaliplatin and experienced several adverse events, with the majority of them being mild in nature including fatigue and cold dysesthesia. However, the patient also experienced progressive neuropathy which required a dose reduction and subsequent discontinuation of oxaliplatin. Overall, pemetrexed and oxaliplatin’s tolerability seems comparable to other regimens used to treat colorectal cancer and could potentially be an option to consider in the future for alternative treatment of colorectal cancer pending further trials.
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