LabPreparation

Drug & Urine Screening

12 Panel Drug Test (Drugs of Abuse Testing) Panel Preparation

  • Blood draw
  • Drug & Urine Screening
  • Prep checklist included

At a glance

12 Panel Drug Test (Drugs of Abuse Testing) Panel: prep snapshot

Sample type
Blood draw
Fasting
Fasting is usually not required for this panel, but requirements can differ by lab.
Best collection time
There is generally no special timing window for this test.
Typical turnaround
Varies by collection lab
Category
Drug & Urine Screening

A 12 Panel Drug Test (Drugs of Abuse Testing) is usually quick, and most of the work is in the preparation: timing, fasting, and a short checklist. The 12 Panel Drug Test screens for a broad set of commonly abused substances.

What this test looks at

The panel screens for up to twelve drug classes, which may include amphetamines, barbiturates, benzodiazepines, cocaine, marijuana, methadone, opiates, and others. The exact list of analytes can vary by the ordering panel, so confirm the included substances with the lab.

  • Amphetamines
  • Barbiturates
  • Benzodiazepines
  • Cocaine
  • Marijuana
  • Methadone
  • Opiates
  • Phencyclidine

Preparation checklist for the 12 Panel Drug Test (Drugs of Abuse Testing)

In most cases nothing extra is needed before this test. Ask the testing location about any timing or fasting instructions before your visit.

  1. Confirm the appointment time and location with the lab before you go.
  2. Ask the lab whether any fasting or timing instructions apply to your visit.
  3. Bring a valid photo ID and your test order or requisition.
  4. Wear clothing that allows easy access to a vein for a blood draw.
  5. Stay hydrated unless the lab tells you otherwise.
  6. Tell the lab about any medications or supplements you take.

Fasting, timing, sample type, and what to bring

Fasting

Fasting is usually not required for this panel, but requirements can differ by lab. Confirm with your lab.

Best time to collect

There is generally no special timing window for this test. Collect the sample at your scheduled appointment as directed by the lab.

Sample type

Blood draw. The collector will explain the process before starting.

What to bring

  • Your printed lab order or requisition form — the ordering physician prepares it for you after you order, and you print it (or fax it from your account) before visiting
  • Your order confirmation email, in case the collection site asks to see it
  • A government-issued photo ID (most collection sites verify identity at check-in)
  • A written list of the medications and supplements you currently take
  • A short-sleeved or loose-sleeved shirt for an easy blood draw
  • Any chain-of-custody paperwork the ordering service provided
  • Water to drink before the draw and a light snack for afterward, if your test requires fasting

You do not need an insurance card or a payment method at the collection site: the lab does not bill insurance, and you pay at order time, so there is no copay or deductible. The lab also provides the physician's requisition, so you do not need a separate doctor's referral.

Order process and what-to-bring details reflect the lab's published instructions, paraphrased in our own words. Confirm final requirements with the collection lab that will perform your draw.

At the collection site

A trained phlebotomist collects a blood sample from a vein, usually in your arm, using a small needle. The sample is then sent to the laboratory for analysis.

Details worth confirming with the collection lab before your visit:

  • Which twelve drug classes are included in this panel?
  • Do I need to fast or follow any timing instructions before the draw?
  • How long will it take to receive my results?

Why a clinician may order this test

A clinician may order this panel to screen for or monitor exposure to commonly abused substances. It can be used in workplace, legal, or clinical settings where broad drug screening is needed.

Your results and next steps

Reference ranges and detection cutoffs vary by laboratory and by the specific panel ordered. Your results should be interpreted by your clinician in the context of your history and the lab's own reporting.

General test information is compiled from publicly available reference material, including MedlinePlus (medlineplus.gov) and the Centers for Disease Control and Prevention (cdc.gov), and is reviewed for clarity. Preparation and what-to-bring details reflect the lab's published instructions, paraphrased into our own words. Preparation instructions, timing, and pricing vary by collection lab — always confirm them with the lab that will perform your draw.

Common questions

Frequently asked questions

Do I need to fast for this test?

Fasting is usually not required, but instructions can vary. Confirm with your lab before your visit.

How long do results take?

Turnaround is typically one to three business days, though it can vary by lab and panel.

What sample is collected?

This test uses a blood sample collected from a vein, usually in your arm.

Can I eat or drink before the draw?

In most cases yes, but ask the lab about any timing or fasting instructions first.