Can you fail a drug test with a prescription? (2023)

Can you fail a drug test with a valid prescription?

Sometimes an individual subject to a drug test may be taking a prescribed substance, which will cause their drug test specimen to yield a presumptive-positive result.

I would suggest bringing your prescription with you for the testing and allow the person doing the test to write down the pertinent information, such as doctor's name, prescription expiration, refills, etc. so this can be included in the report if necessary.

Invalid Sample

“The result of a drug test for a urine specimen that contains an unidentified adulterant or an interfering substance, has abnormal physical characteristics, or has an endogenous substance at an abnormal concentration that prevents the laboratory from completing or obtaining a valid drug test result.”

If your medications or devices are not in their original containers, you must have a copy of your prescription with you or a letter from your doctor. A valid prescription or doctors note is required on all medication entering the United States.

Urine drug testing detects evidence of recent drug use or misuse in a sample of urine. Testing can detect illegal or prohibited drug use, prescription medications, over-the-counter medicines, and legal substances such as alcohol and tobacco.

Under the ADA, an employer can test an applicant for use of illegal drugs. A positive test can be a legitimate reason to not hire someone.

Under the ADA, an employer may ask a current employee about prescription medicine only when it's job-related and consistent with business necessity. That means you may not ask all employees to disclose any medications they take.

Adderall & Drug Testing

You are most likely to test positive for Adderall on a urine test 72-96 hours after last use. Hair test: Though less commonly used than urine tests, hair tests offer a greater window of possible detection time. Traces of amphetamines can be detected for up to 3 months after last use.

Controlled substances

Your doctor must write a new prescription for each fill. Schedule III and IV prescriptions are valid for six months after you fill them. If your doctor provides refills, you have six months to use them.

What causes false positives drug test?

Several of these medications for mental disorders can lead to false positive tests. Quetiapine, which treats schizophrenia and bipolar disorder, can wrongly show that you have methadone in your urine. Another antipsychotic -- chlorpromazine -- can cause drug tests to come up positive for amphetamine, a stimulant.

Once sent, the candidate must go to a clinic and provide another urine collection. Upon review of the positive lab result, the MRO will contact the candidate to review their prescriptions. If no prescription validates the positive drug, the result will be released to the employer as a positive.

Adderall & Drug Testing

You are most likely to test positive for Adderall on a urine test 72-96 hours after last use. Hair test: Though less commonly used than urine tests, hair tests offer a greater window of possible detection time. Traces of amphetamines can be detected for up to 3 months after last use.