Fentanyl is a powerful opioid used for severe pain management but is also highly addictive and dangerous when misused. The drug’s presence in the body varies based on factors like metabolism, dosage, and testing method. Urine tests detect fentanyl for up to 3 days, while it remains in saliva for 1-4 days and in blood for 6-12 hours. Detoxing from fentanyl can take weeks, with withdrawal symptoms peaking within the first few days. Understanding fentanyl’s effects and elimination process is crucial for safe use and recovery.

Cocaine stays in the body for varying durations depending on factors like frequency of use and metabolism. While its effects wear off quickly, traces remain detectable in urine, blood, and saliva for days.