International law. International law is the set of rules generally regarded and accepted as binding in relations between states and between nations. It serves as a framework for the practice of stable and organized international relations.
A blood test can usually only detect codeine for 6 hours or so after a personâs last use. A urine test can detect codeine in a personâs system for 1 to 2 days after their last use. Saliva tests can determine codeine use in most cases for up to 4 days after its last use. Hair tests, which are some of the most powerful drug clearance testing options, will often be able to determine oneâs use of codeine for up to 90 days after their last use.
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.