<prompt> Mucositis is caused by:5-FluorouracilMethotrexatePaclitaxelCisplatin  <response>: Flurouracil is used mainly for solid malignancies,i.e colon, rectum, pancreas, liver, urinary bladder, head, and neck. Genetic deficiency of dihydropyridine dehydrogenaseDPD leads to Fluorouracil toxicity. Major toxicity is myelosuppression, mucositis, diarrhea, nausea, vomiting, peripheral neuropathy hand-foot syndromealso occurs. Other given drugs are anti-cancerous drugs without mucositis. ESSENTIALS OF MEDICAL PHARMACOLOGY-SEVENTH EDITION-K.D TRIPATHI Page; 864 