Drug Overdose  Drug Overdose that`s large enough to be toxic is called an overdose. This may occur suddenly when a large number of the drug is taken at one time, or gradually, as a drug builds up in the body over a longer period of time.    Prompt medical attention may save the life of an individual who accidentally or deliberately takes an overdose. Some of the most dangerous drugs do not require a prescription.       Statistics information from the Food and Drug Administration Using statistics information from the Food and Drug Administration for 2004 through 2015, Health Grove looked at the 150 drugs that are involved…