Drug Testing

At Southwest Labs, we have a robust toxicology testing menu, we also have user-friendly one-page summary results. Eighty+ compounds tested in urine and oral fluid. Southwest Labs Toxicology services complement any organization’s drug testing protocols and provide you with peace of mind.

How DRUG Testing Works


Visit our Patient Service Center. When you make your appointment make sure you select the appropriate location.


Bring your government-issued ID (driver’s license, social security ID, Passport ID), and confirm your organization with our friendly staff.


Make sure to drink plenty of water, and provide the correct sample. We also have validity testing which detects adulterated samples. 


Results for most tests run in-house are generally available within 24-72 hours. Results are sent electronically to the employer/organization. 

Choose YOUR Detection Level

POC (Point of Care) Cup

  • Instant drug screen
  • Not drug-specific
  • Low complexity
  • Not always accurate

EIA (Enzyme Immunoassay)

  • Qualitative tests
  • Results available in 24 hours
  • Adulteration reports
  • Not drug-specific


  • Detects parent compounds and metabolites
  • Quantitative tests
  • Lowest detection levels
  • Urine/oral fluid testing
  • Gold standard for clinical testing

Why DRUG Test?

Reasons for drug test include: Pre-employment, suspicion, random testing, return to work, post-accident, and medication monitoring. Implementing a drug testing protocol in your business can reduce workplace outbreaks, reduce absenteeism, and improve compliance with state and federal regulations.


Many drug users will attempt to evade detection by adulterating the specimen in order to produce false-negative results. Southwest Labs uses validity testing to detect urine adulteration by examining the following: Creatinine, General Oxidant, Specific Gravity, and pH. 


Southwest Labs offers quick and easy pre-employment and random drug testing. We work closely with businesses to ensure the process is quick and convenient for employers and employees. No appointments are needed.

Featured Drug Tests

  • Alcohol
  • Amphetamines/Stimulants
  • Antidepressants
  • Antidepressants-Tricyclic
  • Barbiturates
  • Benzodiazepines
  • Illicits
  • Opiates/ Opioids
  • Opioids & Opiate Analogs
  • Opioids Other
  • Cocaine
  • Ecstasy
  • Heroin
  • Marijuana
  • Phencyclidine (PCP)
  • Codeine
  • Morphine
  • Methamphetamine
  • Hydrocodone
  • & More


Is your small business or corporate in need of drug testing? At Southwest Labs we have streamlined drug testing for employers.

  1. Download & complete the payment authorization form.
  2. Download & complete the new account form.
  3. Email completed forms to sales@southwestlab.com

Drug Testing FAQ

Toxicology testing is used to screen for and confirm the presence of several drugs in a person’s sample, such as urine or oral fluid. Drug testing is used so that a person may receive appropriate medical treatment or be screened for or monitored for illegal drug use.

Drug testing for legal purposes primarily aims to detect illegal or banned drug use in a variety of situations. Sample collection procedures for this type of testing are strictly controlled and documented to maintain a legal “chain-of-custody.” The donor provides a sample that is closed and secured with a tamperproof seal in his or her presence. Specific chain-of-custody paperwork then accompanies the sample throughout the testing process. Each person who handles and/or tests the sample provides their signature and the reason for the sample transfer. This creates a permanent record of each step of the process.

Employment drug testing is a specific type of forensic testing (see above). It may be done prior to employment, on a random basis, following an accident, or if the employer has a reasonable suspicion that an employee is using illegal drugs. Employment drug testing is commonplace. It is required in some industries, such as those that involve the U.S. Department of Transportation, the military and federal employees, and is an accepted practice in many other industries.

While conventional drug testing is performed on competitive athletes, the primary focus is on doping, the use of drugs and/or supplements intended to promote muscle growth and/or to improve strength and endurance. On a local level, sports testing may be limited, but on a national and international level, it has become highly organized.

Drug screening in urine is the method of choice for monitoring adherence to prescription pain medications in patients treated for chronic pain. Urine drug screening provides tools for tracking patient compliance and exposing possible drug misuse and abuse. A health practitioner may periodically order drug testing for patients treated for chronic pain for two purposes: 1) ensuring compliance by patients who are using the prescribed pain medications, and 2) monitoring the use of non-prescribed or illegal substances. Elements of a urine drug screen may include specific gravity, temperature at the time of sample collection, pH, creatinine concentration, and confirmatory testing.

A positive initial drug screening means that the person tested has a substance in his or her body that falls into one of the drug classes and is above the established cutoff level. If secondary testing confirms a positive result, it means that the person has indeed taken this drug.