According to Wikipedia for which cancer type is prescribed the top 20 most influential cancer drugs and comparison with prescriptions by National Cancer Institute and DrugBank.

For each of the top 20 cancer drugs ranked in May 2017 English Wikipedia using PageRank algorithm (see Table 3), we give the three strongest drug → cancer links, i.e., for a given drug d we select the three cancer types cr with the highest values . Cancer type with red background indicates a pure hidden drug → cancer link, i.e., the drug article in Wikipedia does not refer directly to the cancer type. For each drug → cancer link, the cancer type is followed by a ✔ mark if the drug is indeed prescribed for the cancer type according to National Cancer Institute [25] and/or DrugBank [29]; by a ▲ mark if the drug appears only as a subject of passed, ongoing or planned clinical trials reported for the cancer type in DrugBank; and by a ✘ mark otherwise.