Traces of illegal substances found in a person’s blood are often red flags for a person who may be under suspicion by the police. Many illegal substances may be perceived as adding a bigger high to the person when the evidence points at more grim circumstances. It is up to a forensic toxicologist to discover which illegal substances are in a suspect’s bloodstream and how much has been ingested.
Analgesics like morphine can be found in your blood between six to eight hours after ingestion but take up to three days until it exits with the urine. Amphetamines, heroin, and codeine stay in the bloodstream for up to 12 hours and are out with the urine in no more than three days.
Some drugs take a long time to stay in the blood and even longer to be flushed out in the urine, upping the chances of traces being detected if a suspect underwent a checkup. Crystal meth stays in the blood between 24 hours to 72 hours, depending on the method of administration, while being taken out in the urine in between three to six days. Cannabis takes the longest to leave the system– tetrahydrocannabinol lingers in the blood for two weeks and stays in your urine for the next month.
Determining the drugs found in the bloodstream can work in an investigation. They may even work as evidence for other related drug cases.