Cocaine stays in your system for varying lengths of time depending on the type of test used and individual factors such as usage frequency, amount, metabolism, and health. Detection times by test type:

• Blood: Cocaine can be detected for up to about 1 to 2 days (12 to 48 hours) after use. The parent drug itself is usually detectable for less than a day, but its metabolite benzoylecgonine can be found in blood for up to 2 days

• Urine: Cocaine metabolites, especially benzoylecgonine, can be detected in urine for approximately 2 to 4 days after a single use. For heavy or chronic users, detection can extend up to 1 to 2 weeks (5–14 days)

• Saliva: Cocaine can be detected in saliva for up to 2 days, sometimes up to 2–3 days depending on use intensity

• Hair: Cocaine can be detected in hair follicles for the longest period, up to 90 days or even longer, reflecting long-term use but not precise timing

Additional notes:

• Cocaine itself has a short half-life (~1.5 hours), but its main metabolite benzoylecgonine has a longer half-life (~5.5–7.5 hours or up to 12 hours in some studies), which is why drug tests target the metabolite

• Detection windows vary based on dose, frequency, purity, individual metabolism, and whether other substances are consumed

In summary, cocaine is typically detectable in blood and saliva for up to 2 days, urine for up to 4 days or longer in heavy users, and hair for up to 3 months after last use.