Yes it is two medications a friend tried this and got kicked out of clinic
They are all opiates meaning they test your urine for opium which all opiates contain.
It can take 4 to 5 days for cocaine and opiates to get out of your urine, but this may differ from one person to another.
Hydrocodone is a synthetic opioid, and (oddly enough), many standard drug tests don't test for synthetic opiates such as hydrocodone, oxycodone, or fentanyl. The common tests usually test for morphine and codeine, which are the products of heroin. However, a doctor or employer can request a test specifically for synthetic opiates. Look here for more info: http://www.erowid.org/pharms/hydrocodone/hydrocodone_testing.shtml
No
None, there are no antihistamine-type opiates.
Possessing or using synthetic urine to cheat a drug test is illegal in California and can result in a misdemeanor charge, not a felony. However, selling or distributing synthetic urine for this purpose can result in more serious consequences, potentially including felony charges.
opiates
Opiates.
Both of those are opiates
Usually drug tests only test for the metabolite of opiates in your urine. So yes oxycodone will show up in a urine based drug test. Demerol being fully synthetic on the other hand may not.
If you don't take them in the first place, you don't have to worry about getting them out of your urine.