Does Robaxin show in a drug test?

Robaxin (Methocarbamol) should not show up on a regular drug test. MOST drug tests are urine and they are only tested for Amphetamines/Methamphetamine, Cocaine, Marijuana, Opiates, and PCP (Phencyclidine) even a 10 panel urine screen tests for the extra 5 Barbituates, Benzos, Methadone, Methaqualone, and Propoxyphene .

Robaxin is just a muscle relaxant, it is not a controlled substance (that I know of unless something changed recently), and is not known for abuse. So it should not have any reason to be something that is tested for in a drug test.

Usually, a drug test is testing for drugs that are abused. Muscle relaxants do not have a very high abuse rate so it is not regularly tested for.