Drug Testing

Drug testing examines a blood sample to detect the presence of drugs or their breakdown products. It is ordered to screen for substance use, monitor prescribed medications, or investigate suspected overdose or poisoning.

What it measures

Amphetamines — Stimulant drugs that can be detected in blood.
Opiates — Pain-relieving drugs like morphine or codeine.
Cocaine — Illicit stimulant; blood test detects recent use.
Benzodiazepines — Sedatives often prescribed for anxiety or sleep.
Cannabinoids — Active components of marijuana.
Alcohol — Ethanol level, often included in emergency testing.

Who it is for

Healthcare providers order this test in emergency rooms, treatment programs, or during routine monitoring. Employers may require it for safety-sensitive jobs, but a clinician interprets the results.

Preparation

No fasting or special preparation is usually needed. Tell your provider about any prescription or over-the-counter drugs you take, as they can affect results.

Results and what they mean

Results are reported as positive (drug detected) or negative (not detected), sometimes with a level. A clinician interprets findings in context. This is general information, not medical advice.

How to order this test

Choose the test and place a confidential order online.
Select a certified collection site and pick a time that suits you.
Have your specimen collected — most draws take only a few minutes.
Review results in a secure portal, typically within 1–3 days.

Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.

Availability by state

Direct-access online ordering for the drug testing is available in most states. It is currently unavailable in 6 states:

Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →

Frequently asked questions

How long do drugs stay in blood?

Most drugs are detectable for hours to a few days, depending on the substance and your body. Blood tests show recent use better than urine tests.

Can prescribed medications cause a positive result?

Yes, some prescription drugs can trigger a positive screen. Always tell your provider about all medications you take.

Is the test confidential?

Your results are protected health information and are kept private. They are shared only with those you authorize or as required by law.

What if I get a positive result?

A positive result does not automatically mean misuse. Your clinician will consider your history and may order a confirmatory test.