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The frequency at which a certain drug is taken (drug abuse) and the drug tolerance capacity of the person also determine the duration of the drug in the body. Most commonly used drugs like codeine, used to relieve cough and pain, can also stay in the body for more than one day. The following is a chart showing the duration of drugs in the system, in case of prescription as well as drugs of abuse.
How long do drugs stay in your system? The length of time that the presence of drugs of abuse in the body can be detected is an important factor in drug screening. The chart below outlines approximate duration times in human urine. For oral drug detection times see Saliva Drug Detection Window.