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oral administration of S-1 — Competitive Intelligence Brief
phase 3
Fluoropyrimidine antimetabolite
Thymidylate synthase, dihydropyrimidine dehydrogenase
Oncology
Small molecule
Live · refreshed every 30 min
Target snapshot
oral administration of S-1 (oral administration of S-1) — Japan Clinical Oncology Group. S-1 is an oral combination of tegafur, gimeracil, and oteracil that inhibits thymidylate synthase and fluorodeoxyuridylate synthase to block DNA synthesis in cancer cells.
Comparator set (6 drugs)
| Drug | Generic | Sponsor | Phase | Class | Target | Approval / PDUFA |
|---|---|---|---|---|---|---|
| oral administration of S-1 TARGET | oral administration of S-1 | Japan Clinical Oncology Group | phase 3 | Fluoropyrimidine antimetabolite | Thymidylate synthase, dihydropyrimidine dehydrogenase | |
| Placebo plus S1 | Placebo plus S1 | Chinese PLA General Hospital | marketed | Fluoropyrimidine antimetabolite | Thymidylate synthase, dihydropyrimidine dehydrogenase | |
| Capecitabine (Xeloda®) | Capecitabine (Xeloda®) | National Cancer Center, Korea | marketed | Fluoropyrimidine antimetabolite | Thymidylate synthase | |
| Capecitabine tablets | Capecitabine tablets | UNICANCER | marketed | Fluoropyrimidine antimetabolite | Thymidylate synthase | |
| XELODA [capecitabine] | XELODA [capecitabine] | Hoffmann-La Roche | marketed | Fluoropyrimidine antimetabolite | Thymidylate synthase | |
| Mitomycin and doxifluridine | Mitomycin and doxifluridine | Asan Medical Center | phase 3 | Chemotherapy combination (alkylating agent + fluoropyrimidine antimetabolite) | DNA (mitomycin); thymidylate synthase and nucleotide metabolism (doxifluridine) | |
| S-1 and cisplatin | S-1 and cisplatin | Asan Medical Center | phase 3 | Fluoropyrimidine antimetabolite + platinum-based alkylating agent | Thymidylate synthase (S-1); DNA (cisplatin) |
Recent regulatory actions (last 90 days)
Upcoming PDUFA dates (next 180 days)
Patent timeline (forward window)
Sponsor landscape (Fluoropyrimidine antimetabolite class)
- Federation Francophone de Cancerologie Digestive · 2 drugs in this class
- National Cancer Center, Korea · 2 drugs in this class
- Hoffmann-La Roche · 1 drug in this class
- Japan Clinical Oncology Group · 1 drug in this class
- Jiangxi Provincial Cancer Hospital · 1 drug in this class
- Peter MacCallum Cancer Centre, Australia · 1 drug in this class
- Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University · 1 drug in this class
- Taiho Pharmaceutical Co., Ltd. · 1 drug in this class
- The First Affiliated Hospital of Henan University of Science and Technology · 1 drug in this class
- UNICANCER · 1 drug in this class
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- oral administration of S-1 CI watch — RSS
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- oral administration of S-1 alone — RSS
- Whole Fluoropyrimidine antimetabolite class — RSS
Cite this brief
Drug Landscape (2026). oral administration of S-1 — Competitive Intelligence Brief. https://druglandscape.com/ci/oral-administration-of-s-1. Accessed 2026-05-17.
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