How long does the drug stay in our body?

How long does the drug stay in our body?

Introduction

Have you ever wondered how long a drug remains detectable in the body? Whether for professional screening, roadside checks, or simple curiosity, it is essential to understand detection times according to the type of test used: urine, blood, saliva, and hair.

This guide presents the average detection times for major drugs and the factors that influence their elimination.

Drug detection times by test type

1. Detection in urine

Urine is the most commonly used test because it is simple, fast, and effective. Here are the average detection times:

• Cannabis (THC): 1 to 3 days (single use), 10 to 30 days (chronic use)
• Cocaine, crack: 2 to 4 days
• Amphetamines, methamphetamines: 1 to 3 days
• MDMA (ecstasy): 2 to 4 days
• Heroin, morphine, opiates: 1 to 3 days
• Oxycodone, tramadol: 2 to 4 days
• Fentanyl, nitazenes: 1 to 3 days
• Benzodiazepines (Valium, Xanax, Rohypnol): 3 days to several weeks (depending on the product's half-life)
• GHB: 12 to 24 hours
• Ketamine: 3 to 4 days
• LSD: 1 to 3 days

2. Detection in blood

Blood tests detect drugs over a shorter period but provide an accurate measure of recent use:

• Cannabis: 1 to 3 days
• Cocaine, crack: 12 to 48 hours
• Amphetamines, methamphetamines: 24 hours
• MDMA (ecstasy): 12 to 24 hours
• Heroin, morphine, opiates: 6 to 24 hours
• Fentanyl, nitazenes: 6 to 12 hours
• Benzodiazepines: 12 hours to 3 days
• GHB: 6 to 12 hours
• LSD: 3 to 12 hours
• Ketamine: 24 hours

3. Detection in saliva

Saliva tests are often used for roadside checks because they detect recent use:

• Cannabis: 6 to 24 hours
• Cocaine, crack: 24 hours
• Amphetamines, methamphetamines: 1 to 2 days
• MDMA (ecstasy): 1 to 2 days
• Heroin, morphine, opiates: 1 to 2 days
• Fentanyl, nitazenes: 12 to 24 hours
• Benzodiazepines: 1 to 3 days
• GHB: 6 hours
• LSD: 1 to 2 days
• Ketamine: 1 to 2 days

4. Detection in hair

Hair tests can detect past use because substances are incorporated into the hair structure:

• All drugs: Up to 90 days (or more depending on hair length)

Factors influencing detection time

The detection time of a drug depends on several factors:

• Frequency and amount of use: Occasional use leads to faster elimination than regular use.
• Individual metabolism: Depends on liver enzyme activity and body composition.
• Method of consumption: Injection and inhalation have faster effects than ingestion.
• Type of drug: Some drugs persist longer than others (e.g., THC stored in fat vs. cocaine eliminated quickly).

Conclusion

The detection time for drugs varies depending on the substance, the test used, and the physiological characteristics of each individual. Urine tests are the most common due to their accessibility, while blood tests measure recent use and hair tests can establish a history over several months.

Understanding these durations helps avoid misconceptions and better grasp the implications of consumption in case of testing.

💡 Practical information on screening

During a roadside check, the gendarmerie saliva test is commonly used to detect the presence of drugs. Many wonder about how long the gendarmerie saliva drug test stays positive: it depends on metabolism, but THC remains detectable from several hours up to a few days. The gendarmerie THC saliva test (or gendarmerie saliva THC test) specifically targets recent cannabis use.

For prevention at home or in the workplace, taking a THC saliva test (also called a saliva THC test) is an excellent step. If you’re looking to equip yourself, you might be wondering where to buy an equivalent gendarmerie saliva test? Although it can sometimes be hard to find a THC saliva test at a pharmacy, you can order our professional devices directly online.