Do diet pills show up on a drug test?

Ephedrine will not cause a negative test for other drugs. What organization is giving you the drug test is important. The International Olympic Committee tests for ephedrine and well as most bodybuilding associations. Just check the rules and regulations of your organization to see if ephedrine is a banned substance. Ephedrine is not illegal in the United States. However, it cannot be marketed as a supplement for weight loss. It can only be sold as a bronchodilator in packaging where each pill is individually packed. It is widely held that ephedrine can cause a false positive for amphetamines, however, because the two are chemically similar.