Pancreatic Cancer Medication

Updated: Jul 15, 2017
  • Author: Tomislav Dragovich, MD, PhD; Chief Editor: N Joseph Espat, MD, MS, FACS  more...
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Medication

Medication Summary

The most active single agents for pancreatic cancer have been 5-fluorouracil (5-FU) and gemcitabine. Gemcitabine appears to be slightly more active than 5-FU. Objective responses, meaning actual regression of tumor, have been 20% or less.

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Antineoplastic agents

Class Summary

These agents inhibit cell growth and proliferation. They are used for chemotherapy.

Gemcitabine (Gemzar)

A frequently quoted trial showed a small, but statistically significant, improvement in overall survival with gemcitabine versus 5-FU (5.7 vs 4.4 mo). Additionally, gemcitabine improved the quality of life in approximately 25% of patients. It is a pyrimidine antimetabolite that nhibits DNA polymerase and ribonucleotide reductase, which in turn inhibit DNA synthesis.

Fluorouracil (Adrucil)

This is a fluorinated pyrimidine antimetabolite that inhibits thymidylate synthase (TS) and also interferes with ribonucleic acid (RNA) synthesis and function. Fluorouracil has some effect on DNA and is useful in symptom palliation for patients with progressive disease. It is commonly used in patients with gastrointestinal malignancies. Response rates are typically less than 20% in pancreatic cancer.

Erlotinib (Tarceva)

This agent is pharmacologically classified as a human epidermal growth factor receptor type 1/epidermal growth factor receptor (HER1/EGFR) tyrosine kinase inhibitor. EGFR is expressed on the cell surface of normal cells and cancer cells. Erlotinib has been approved by the FDA for use, in combination with gemcitabine, as a first-line treatment for locally advanced, unresectable, or metastatic pancreatic cancer.

Capecitabine (Xeloda)

Capecitabine is a prodrug of fluorouracil that undergoes hydrolysis in liver and tissues to form the active moiety (fluorouracil), inhibiting thymidylate synthetase, which in turn blocks methylation of deoxyuridylic acid to thymidylic acid. This step interferes with DNA, and to a lesser degree with RNA synthesis.

Paclitaxel protein bound (Abraxane)

Paclitaxel protein bound is a microtubular inhibitor (albumin-conjugated formulation) and a natural taxane that prevents depolymerization of cellular microtubules, which results in DNA, RNA, and protein synthesis inhibition. It is indicated for metastatic adenocarcinoma of the pancreas as first-line treatment in combination with gemcitabine.

Irinotecan liposomal (Onivyde)

Irinotecan and its active metabolite SN-38 bind reversibly to the topoisomerase-1 DNA complex and prevent re-ligation of the single-strand breaks, leading to exposure time-dependent double-strand DNA damage and cell death. Irinotecan liposomal is used in combination with fluorouracil and leucovorin for metastatic adenocarcinoma of the pancreas after disease progression following gemcitabine-based therapy.

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