Falsifying a Drug Test in Texas: § 481.133 Penalties and Felony Charges

Falsifying a drug test in Texas is a crime in its own right, and depending on why the test was being given, it can range from a Class B misdemeanor to a third-degree felony. The dedicated statute, Texas Health and Safety Code Section 481.133, targets both the person using synthetic urine or an adulterant and the person selling it. If the test was ordered by a court, a probation officer, or any other official proceeding, prosecutors can add a tampering charge that carries prison time.

The Law That Directly Covers Fake Drug Tests

Section 481.133 of the Texas Health and Safety Code is the state’s dedicated drug test falsification law. It creates two separate offenses. Subsection (a) covers using, or possessing with intent to use, any substance or device designed to produce a false result. Subsection (b) covers delivering, manufacturing, or possessing with intent to deliver such a substance or device.1State of Texas. Texas Health and Safety Code 481.133 – Offense: Falsification of Drug Test Results

The statute defines a “drug test” as any lawfully administered test designed to detect a controlled substance or marijuana. Employer screenings, court-ordered probation tests, and tests required by state licensing agencies all qualify. Synthetic urine, additives that claim to mask or neutralize metabolites, and prosthetic dispensers all count as substances or devices designed to falsify results.1State of Texas. Texas Health and Safety Code 481.133 – Offense: Falsification of Drug Test Results

Penalties Under Section 481.133

The charge level turns on which side of the transaction you were on, not on who ordered the test.

A common misreading of the statute is that faking a government-ordered test automatically pushes the charge up. It doesn’t. On its own, Section 481.133 draws the line between user and supplier, not between private and official testing. The reason official tests get treated more harshly is that a different statute kicks in.

When Fake Tests Become a Felony

If the drug test is connected to a pending investigation, a probation check, or any other official proceeding, prosecutors can also charge tampering with physical evidence under Texas Penal Code Section 37.09. The offense covers making, presenting, or using any record, document, or thing you know to be false, with intent to affect the outcome of an investigation or official proceeding. Submitting a synthetic urine sample during a court-ordered screen fits. The charge is a third-degree felony, with a punishment range of two to ten years in prison and a fine of up to $10,000.4State of Texas. Texas Penal Code 37.10 – Tampering With Governmental Record

Section 37.10, which covers tampering with a governmental record, can also come into play when test results feed into official court or agency files. The baseline is a Class A misdemeanor; it rises to a state jail felony when the intent is to defraud or harm, and to a third-degree felony when the falsified record involves a chemical or toxicological examination tied to a criminal case.4State of Texas. Texas Penal Code 37.10 – Tampering With Governmental Record

A state jail felony on its own carries 180 days to two years in a state jail facility, served in a state-run rather than county facility, with a possible fine of up to $10,000. If a deadly weapon was used or the defendant has certain prior felony convictions, the state jail felony can be enhanced to a third-degree felony with a two-to-ten-year prison range. That enhancement is uncommon in drug test cases but is on the books.5State of Texas. Texas Penal Code 12.35 – State Jail Felony Punishment

The practical result: someone who buys synthetic urine for a pre-employment screen is looking at a Class B misdemeanor. Someone who submits that same product during a probation drug check could be charged with the misdemeanor and the felony tampering offense together.

If You’re on Probation

Faking a test while on community supervision (Texas’s term for probation) creates two problems at once: the new criminal charge and a violation of your supervision conditions.

Once a probation officer reports the violation, the judge can issue an arrest warrant. After arrest, you can be held in county jail until brought before the judge, who must hold a hearing within 20 days if you request one. The judge then decides whether to continue, modify, extend, or revoke your supervision.6State of Texas. Texas Code of Criminal Procedure Art. 42A.751

Revocation is the worst outcome. If the judge revokes supervision, the original suspended sentence can be imposed. For felony probation, that can mean years in prison. The standard of proof at these hearings is preponderance of the evidence, not beyond a reasonable doubt, so the state has a lower bar to clear than at trial.

Even short of revocation, the judge can extend the probation period, add conditions such as more frequent testing or residential treatment, or pile on community service hours. Falsifying a test tends to signal active circumvention rather than a slip, and courts respond accordingly.

If You’re on Parole

Parolees go through a different process. When a parole officer suspects a violation, the Texas Board of Pardons and Paroles can issue a warrant. The parolee is entitled to a hearing before a parole panel or the board’s designated agent. If the panel confirms the violation, it may revoke parole and return the parolee to the institution where the original sentence was being served.7State of Texas. Texas Government Code 508.281 – Hearing

A parolee returned to prison typically serves the remainder of the original sentence, less any time already credited. There is no jury and no reasonable-doubt standard. The panel decides on the evidence it hears, and lab results paired with testimony from the testing facility usually leave little room for argument.

Job, License, and Unemployment Fallout

The criminal case is only part of the picture. A conviction for faking a drug test shows up on background checks, and because the offense is rooted in dishonesty, it reads as more than a drug issue to employers. In regulated industries like healthcare, transportation, and oil and gas, it is commonly treated as a disqualification.

Texas licensing boards for nurses, pharmacists, commercial drivers, and others with public safety roles review criminal records as a matter of course. A conviction under Section 481.133 or a tampering statute flags both substance abuse concerns and a willingness to deceive regulators, and can lead to license suspension, revocation, or denial of a new application.

Unemployment benefits can also become harder to collect. Federal regulations allow states to drug test unemployment applicants in certain circumstances tied to unlawful drug use.8eCFR. Drug Testing for State Unemployment Compensation Eligibility Determination Purposes (20 CFR Part 620) Being fired for faking a test rather than failing one adds a misconduct layer that generally makes a claim harder to sustain, because the termination is grounded in dishonesty rather than addiction or a medical issue.

What the State Has to Prove

For a Section 481.133 conviction, the prosecution has to show that you knowingly or intentionally used or possessed a substance or device designed to falsify drug test results. Both the mental state and the nature of the product matter. If you genuinely didn’t know what the substance was, or the product wasn’t actually designed to fake a test, that can form the basis of a defense.1State of Texas. Texas Health and Safety Code 481.133 – Offense: Falsification of Drug Test Results

For a tampering charge under Section 37.09, the state must also show that an investigation or official proceeding was pending or in progress and that you intended to affect its outcome. That requirement is why a private pre-employment screen with no criminal case attached typically won’t support a tampering count, while a court-ordered test during probation almost always will.

Evidence in these cases usually includes observations from collection site staff, lab analysis identifying the sample as synthetic or adulterated, surveillance footage from the testing facility, and purchase records for the product used. Chain-of-custody problems with the sample can sometimes open a defense, especially when the testing protocol departed from standard procedure.