There are some medication routinely prescribed for diabetes that are NOT compatible with grapefruit. Be sure you are not taking any of these medications before you start eating grapefruit. To find out of any of your prescription medicine is not compatible with grapefruit read all the information about the medicine. This can be found by using the search engine at www.google.com and typing in the name of your medication in the search engine there. Read the precations about that medicine and make sure it is all right to eat grapefruit while taking it.