Morphine typically stays in your system for the following durations, depending on the type of test and individual factors such as metabolism, dosage, and frequency of use:

• Urine: Morphine can be detected in urine for up to 3 days after use, with some sources noting detection up to 4 days in certain cases

. Most of the drug is excreted within the first 8 hours, but metabolites can linger longer

• Blood: Morphine is usually detectable in blood for up to 12 to 24 hours post-administration

, though some tests may detect it up to 3 days

• Saliva: Morphine can be detected in saliva for up to 3 to 4 days after use

• Hair: Morphine can be detected in hair follicles for up to 90 days, reflecting longer-term use

Morphine has a relatively short elimination half-life of about 2 to 3 hours, meaning it takes roughly 15 hours (about five half-lives) for the drug to be mostly eliminated from the body. However, drug tests can detect morphine and its metabolites beyond this time frame due to accumulation and slower metabolite clearance

. In summary, morphine is generally detectable in urine and blood for up to 3 days, saliva up to 4 days, and hair up to 90 days after use, though individual factors and test sensitivity can influence these windows