LabInformationLab tests, explained

12 Panel Drug Testing in California

This page explains the 12 panel drug testing, what it measures, and how to arrange it. The 12 panel drug testing screens a blood sample for up to twelve common drugs or drug classes, including prescription medications and illegal substances. It is ordered to check for recent drug use in medical, employment, or legal settings. This page covers the 12 panel drug testing for people in California, in Pacific, from what it measures to how to arrange a draw.

Sample type
blood
Category
Drug & Urine Screening
Turnaround
1-3 business days
Price
$158
Referral
Not required

The 12 panel drug testing screens a blood sample for up to twelve common drugs or drug classes, including prescription medications and illegal substances. It is ordered to check for recent drug use in medical, employment, or legal settings.

What it measures

  • Amphetamines — Stimulants such as Adderall or methamphetamine.
  • Barbiturates — Sedatives that can cause drowsiness.
  • Benzodiazepines — Anti-anxiety drugs like Valium or Xanax.
  • Cocaine — A stimulant that breaks down quickly in blood.
  • Opiates — Pain relievers like morphine or codeine.
  • THC (marijuana) — The active ingredient in cannabis.

Who it is for

A healthcare provider may order this test during a medical evaluation. Employers, courts, or other organizations may also require it.

Preparation

No fasting or special preparation is usually required. Tell the collector 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 or negative for each drug panel, often within 1–3 business days. A clinician interprets them alongside your health history. This is general information, not medical advice; only a qualified professional can interpret your results.

Requesting the 12 Panel Drug Testing in California

Order online, choose a certified collection site in California, and review results through a secure portal. No referral is required, and orders are processed confidentially. With coastal metros, inland towns, and rural counties with very different access to testing, it pays to schedule your collection in advance.

Frequently asked questions

What does a positive result mean?

It means the drug or its breakdown product was detected in your blood. It does not by itself diagnose a substance use disorder.

Can I eat or drink before the test?

Yes, no fasting is needed unless your provider says otherwise.

How long do drugs stay in blood?

Detection times vary by drug, amount, and frequency of use. Blood tests usually show recent use, from hours to a few days.

Will my results be kept private?

Yes, medical results are confidential and shared only with those you authorize or as required by law.

12 Panel Drug Testing by city in California

All testing in California →   Full 12 Panel Drug Testing guide →