Comprehensive alcohol & food interactions for capecitabine. Grapefruit juice might decrease how fast the body gets rid of quinidine. Concomitant use of drugs that inhibit or induce CYP3A4, such as ketoconazole or carbamazepine, affect lapatinib's pharmacokinetics so dose adjustment of lapatinib with these drugs may be needed. Stay healthy the easy way with help from Superpharmacy. Drinking grapefruit juice while taking some medications for high blood pressure might cause your blood pressure to go too low.The body breaks down some medications used for lowering cholesterol to get rid of them. Comprehensive alcohol & food interactions for Xeloda (capecitabine). If the tablet must be cut or crushed, it should be done by a pharmacist. For example, capecitabine is frequently administered for 14 days of a 21-day cycle while temozolomide may be administered for 5 days of a 28-day cycle. For example, methotrexate is most commonly given as a once-weekly dose . Drinking grapefruit juice while taking carvedilol (Coreg) might increase the effects and side effects of carvedilol (Coreg).Grapefruit juice might decrease how quickly the body gets rid of cisapride (Propulsid). (3) A person must not sell any poison in a container that is not readily distinguishable from a container in which food, alcohol, other beverage or condiment is sold. The amount of medicine that you take depends on the strength of the medicine. Any reference in these archives to AstraZeneca products or their uses may not reflect current medical knowledge and should not be used as a source of information on the present product label, efficacy data or safety data. Cancer cells need to make and repair DNA so they can grow and multiply. You may also read this in the drug information sheet enclosed with your medicine. Overall survival rates were similar in both groups, with 36 deaths in the lapatinib plus capecitabine group and 35 in the capecitabine group.