How Long Does Cocaine Stay In Your Hair?

Cocaine can be detected in hair follicles for up to 90 days after last use, making hair testing one of the longest detection methods available. Unlike urine or blood tests that only show recent drug use, hair follicle tests provide a much wider window for detecting cocaine and other substances. This extended detection period makes hair testing a common choice for employers, legal cases, and situations requiring proof of long-term sobriety.

Hair follicle tests are typically conducted in hospitals or outpatient lab settings. While less common than urine tests for routine drug screening, they’re valued for their ability to reveal patterns of drug use over several months.

Cocaine Detection Time In Hair

The drug detection time refers to the amount of time a drug screening can show if a person has used drugs like cocaine. Drug screenings that test hair samples can detect cocaine use up to three months, or 90 days, after someone’s last use of cocaine.

How Do Drug Screenings Detect Cocaine In Hair?

Cocaine can have powerful but short-lived effects. It has a short half-life, which means it is rapidly metabolized in the body. Cocaine is metabolized by enzymes in the liver and blood. Drug screenings can detect cocaine use through the presence of benzoylecgonine, which is the main metabolite of cocaine. Cocaine metabolites are detectable in the hair, urine, saliva, and blood for longer than cocaine.

Washing your hair, dying your hair, or using styling products will not affect how long cocaine stays in your system. If someone does not have hair on their head, body hair may be collected for a drug screening.

How Hair Follicle Testing For Cocaine Works

Hair follicle testing involves collecting a small sample of hair, typically about 1.5 inches in length, from the scalp. This length represents approximately 90 days of hair growth, which is why the detection window is three months. If head hair is unavailable or too short, body hair from the chest, arms, or legs can be used instead. The sample is usually taken from the back of the head where hair growth is most consistent.

Once collected, the hair sample is sent to a laboratory where it undergoes a thorough cleaning process to remove any external contaminants. The hair is then dissolved using special chemicals, and the resulting solution is analyzed for drug metabolites like benzoylecgonine. Hair follicle tests are highly accurate and difficult to cheat. Secondhand cocaine smoke exposure is unlikely to cause a positive test result, as the drug must be metabolized in the body and deposited into the hair shaft through the bloodstream.

Factors That Can Affect Drug Detection Times

There is a wide range of biological, genetic, and personal factors that can influence how long cocaine is detectable in your system.

These factors include:

• how much cocaine is used
• how often cocaine is used
• history of drug abuse
• hydration level
• body composition (body fat, weight, height)
• genetics
• age

Being dependent or addicted to cocaine can influence the timeframe for drug detection. This is due to how the body adapts to the use of drugs like cocaine over time, thereby affecting drug metabolism.

Why Are Drug Screens Used?

Drug screenings can be ordered by healthcare providers, courts, and employers as a condition of employment during the hiring process or after being hired for a job. Drug tests may be supervised.

Drug tests can be used for the following:

• pre-employment screening
• drug-free workplace programs
• monitoring prescription opioid use
• sports organizations (e.g. screening for steroid use among athletes)
• criminal investigations and forensic purposes
• court-mandated drug testing

Drug tests are sometimes ordered if someone is showing signs or symptoms of illicit drug use. Cocaine can cause a wide range of physical and psychological symptoms that can indicate substance abuse and addiction.

Cocaine Use: Signs And Symptoms

A doctor may order a drug screen if a patient with or without a history of substance abuse is showing signs of cocaine use.

Common signs of cocaine use include:

• track marks (from injection)
• runny nose
• talking very fast
• mood swings
• fast heart rate
• irregular heartbeat
• high blood pressure
• dramatic weight loss
• muscle twitches and tremors
• psychosis (hallucinations, delusions, or paranoia)
• increased body temperature
• decreased interest in activities previously enjoyed

Although the effects of cocaine can wear off quickly, these short-term side effects can be followed by symptoms of a ‘crash’ and withdrawal symptoms. Chronic cocaine abuse can also cause severe consequences to physical health and mental health.

Getting Help For Cocaine Addiction

If you or someone you care about is struggling with cocaine use, professional treatment can help break the cycle of addiction. Cocaine is a highly addictive stimulant that often requires medical and therapeutic support to quit safely. Many people find they can’t stop abusing cocaine on their own, even when they want to. This is a sign that professional help is needed.

Treatment options for cocaine addiction include medical detox to manage withdrawal symptoms, inpatient rehab programs that provide 24/7 care, and outpatient programs that allow you to receive treatment while living at home. Therapy approaches such as cognitive behavioral therapy (CBT) and group counseling help address the causes of addiction and build coping skills. Many rehab centers also offer medication-assisted treatment and holistic therapies to help people reach sobriety. If you’re facing drug testing for employment or legal reasons and concerned about the results, seeking treatment now can demonstrate your commitment to recovery.

Written by the Addiction Resource Editorial Staff