You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following anticancer drug is excreted by lungs ? and explain in detail?
5-Fluorouracil is rapidly metabolized in liver to produce biologically inactive metabolites which are eventually con­verted to carbon dioxide and eliminated by lungs.
Excretion of 80% of 5-FU can be accounted for by conversion to carbon dioxide within 12 hour of administration though its excretion in urine is only 15%.
Also note other drugs excreted by lungs are procainamide, procaine and antipyrine.