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NCI Dictionary of Cancer Terms


phosphonoformate trisodium  listen  (FOS-foh-noh-FOR-mayt try-SOH-dee-um)

  A drug used to treat infections with herpesviruses in people whose immune systems are weakened by AIDS. It blocks the viruses from making copies of themselves. It is a type of antiviral agent. Also called foscarnet sodium and Foscavir.