Jeremy Mayfield has denied using methamphetamines and contends the drug-test findings that prompted his suspension by NASCAR were the result of prescription medication. (Photo: LAT Photographic)

Among the drugs listed:

• Stimulants, such as amphetamine, methamphetamine, Ecstasy (MDMA), Eve (MDEA) and Phentermine.

• Narcotic analgesics, such as hydromorphone, methadone, morphine, oxycodone, oxymorphone, heroin, codeine and hydrocodone.

• Ephedrine, such as pseudoephedrine and phenylpropanolamine if used in a manner inconsistent with the instructions provided by the drug manufacturer or in a manner or amount that risks the health, safety or impairs a driver.

• Benzodiazepines, such as lorazepam (Ativan), oxazapam (Serax), temazepam (Restoril), Alpha-hydroxyalprazolam (Xanax) and Nordiazepam (Valium).

• Barbituates, such as amobarbital (Amytal) and secobarbital (Seconal).

• Performance enhancing drugs, such as Human Growth Hormone (hGH), as well as anabolic androgenic steroids (AAS), including testosterone.

• Muscle relaxers, such as carisoprodol (Soma), meprobamate (Miltown, Meprospan).

• Sleep aids, such as zolpidem (Ambien)

• Beta blockers, such as alpernolol and carteolol.

• Alcohol: A competitor is prohibited from consuming any alcohol 12 hours prior to or during on-track activity. A driver is considered unfit if the blood-alcohol level is above 20 milligrams per 100 milliliters (0.02 percent).

• Dietary supplements with a warning advising non-use if the purchaser is subject to a drug-testing program even though available without a prescription.

• Masking agents designed to avoid detection, including Aromatase inhibitors that may be used to biologically manipulate the testosterone/epitestosterone ratio, and/or using epitestosterone to artificially alter the testosterone/epitestosterone ratio.

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