does voltaren show up in a urine test

Hmmm....I can't help you on whether or not voltaren shows in a urine sample.  I just don't know.  I did want to share that I was an HR professional for years and would do urine and hair testing frequently as part of my job.  Here are some things to keep in mind.  When drug tests are being administered, there is a select panel of illegal street type drugs that are being "looked" for.  I'm sure testing could be done to identify tons of additional substances ei. nicotine, caffeine....you name it!  However, for an employer to go on a fishing expedition for legal substances would be an illegal invasion of privacy not to mention SHOCKINGLY expensive. 

All that said, I had on occasion gotten positive drug screens for prescribed medications that fit into a particular class of drugs.  There are some meds, yes often pain meds, that are opiates and would show.  All I would do in this case is FIRST examine the employees input on the testing form.  There is typically a line where an employee can list any medications they have concerns about prior to testing.  I would then call the testing agency to see if the listed drug would account for the positive and at a reasonably similar level.  If nothing was listed on the form, I would make a call to the person and let them know they tested positive for "whatever".  If they could offer a reasonable explanation I might ask them to demonstrate to the testing agency that they had a legally prescribed medication that would account for the positive.

End story:  If the positive drug screen had a "legal" explanation that could be demonstrated, that was the end of the story.  Period.