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What Drugs Don’t Show up on a Standard Drug Test 17 May 2017

What Drugs Don’t Show up on a Standard Drug Test

Before we get into the meat and potatoes of this topic, I would like to point out that I am writing this blog for informational purposes only, for parents, loved ones, and family members of people who are using. This content is in no way intended to promote or encourage addicts to find ways to sneak around halfway house and treatment drug tests. A little later on I will explain why that is a futile attempt despite its possibly appealing appearance.

What is a Standard Drug Test?

A standard, 12-panel drug screen is one that can often be bought at any pharmacy or drugstore. While most treatment centers do also use 12-panels when providing clients with a Urinalysis (drug test), there is one major difference.

Drug and alcohol rehabilitation centers will often send the urine results to a lab for further investigation and a more thorough report as to the diagnostics of the specimen. That being said, they will find results for drugs that the standard 12-panel doesn’t routinely check for.

A 12-panel screen will always check for:

Cocaine Marijuana
PCP Amphetamines
Opiates Benzodiazepines
Barbiturates Methadone
Propoxyphene Quaaludes
Ecstasy/MDMA Oxycodone/Percocet


There are, however, a list of drugs that don’t show up on a 12-panel screen. More often than not, for a family member or loved one to be drug testing someone in their own home, without the ability of sending the results to a lab, the drugs listed above are usually the ones that are purposely being tested for.

However, some of the drugs that don’t show up on the 12-panel will allow the user to continue on their addictive path, all the while going unnoticed. We will categorize by the type of drug to compare it to.

Opiates = Dilaudid and Fentanyl

Dilaudid, otherwise known as Hydromorphone, is a type of opioid that leaves the body in a rapid amount of time. If a drug test was administered within an 8-hour window, the drug would show up. However, unlike heroin and other forms of opiates, after that 8-hour window is up, it can go completely unrecognized in the standard drug test if not sent to a lab. Dilaudid is just as addicting as any other opiate type of drug. While many people use them because they are cleaner and less likely to cause overdose than heroin- especially with the explosion of fentanyl.

Speaking of Fentanyl, it is another drug that will not show up on drug tests. This is because the body metabolizes it differently, thus it does not register as morphine or even an opiate. Similar to Dilaudid, these are considered opioids, not opiates because they are not derived from the opium plant. They are created and structured in a lab to closely resemble the effects that opiates bring, but are not created from the same base. Thus, they will not register on a standard drug test.

various prescription pills

Hallucinogens = LSD, Psilocybin, Ketamine

In the last decade, the party scene has exploded with thousands of different variations of hallucinogenic drugs. I used to be big into that scene, and we would call them research chemicals. These chemicals, as well as the pure and original drugs they are modeled after, will never show up on a standard drug test. It is unclear why, probably because it is usually pretty obvious if a person is “tripping” as the kids say. Just check the pupils, and if they start rubbing walls or soft materials, it is probably safe to say they are on hallucinogens. Just give them some water and let them calm down before you yell at them to prevent any serious trauma.

Ketamine is a veterinarian grade animal tranquilizer that… to put it simply, “Effs you up” hard. It is a dissociative, so it pretty much removes all ability to properly use hand-eye coordination. Imagine the drunkest you’ve ever been, now add on a high prescription pair of glasses and your grandmother’s high heels. And voila! Ketamine. It is super addictive and frequent users often find that they build a tolerance pretty quickly to this white powder.

Lyrica and Gabapentin

These drugs are created as non-narcotic pain medications, primarily for people who suffer from nerve damage. In the last few years, many treatment centers have begun prescribing gabapentin as a detox medication for patients who suffer from severe withdrawal symptoms. While it does help alleviate that issue, it has been found that many of those users continue to be prescribed this medication. In large doses, it can have almost a drunk effect on the user.

Lyrica has a similar effect on a user and is known to be addictive. It can cause withdrawal-like symptoms and create a drug craving for people who stop taking it. It almost creates that same drunk sensation, with slurred speech and vision, dizziness, an elated feeling, etc.

Again, while standard 12-panel drug screens do manage to get the most dangerous drugs identified, there will always be ways for people to slip through the cracks if they are using. The safest bet, if you are worried about a loved one, is to try and help them get into a drug and alcohol rehabilitation center. All of these drugs (besides acid and mushrooms, let’s be honest) can be extremely dangerous when abused and can create the same drug addicted behaviors as the famous deadly ones we are all aware of.

Freedom From Addiction

If you have found yourself or a loved one suffering from alcoholism or addiction, you are not alone! If you are ready to change your life and live free of addiction, then Holistic Recovery Centers can help. We give you the jump start to recovery you need. Our holistic program is unique in that it doesn’t just treat the addiction, it treats the whole person. For more information on our program, call 1-844-282-0548 today.