Answer: The drug screen would include testing for oxycodone, the opioid that both Oxy-Contin and Percocet contain, so yes, pretty much. If they also tested for acetaminophen and there were no detectable levels, they could rule out that you took Percocet or some generic form of a preparation containing both oxycodone and acetaminophen, but know that you took oxycodone in some form.
Answer: None. Adderall shows up on a drug test as methamphetamine (essentially no different than if you were doing meth). This is because the product contains amphetamine salts. But because amphetamines are PRESCRIPTION ONLY, you will not find them in any over the counter drugs.
Answer: It depends whether they are testing hair from the head or hair for the body. Normally it is 90 days (with a standard test) but it can be up to a year if they test body hair. Check out the link I added for detailed information.
Answer: Everything will show in a hair drug test. This specific drug test is very exact, it is able to narrow it down to the month, and in some instances, the week of which this medication was taken. Also this test can show everything taken or used in the last 5 years.
Answer: Hair drug tests (and the other drug testing modalities, for that matter) do not routinely test for the presence of penicillin. The drugs commonly tested for are: 1. THC (marijuana) 2. Cocaine 3. Amphetamines & methamphetamines (including "rave drugs" like ecstasy) 4. PCP ("angel dust") 5. Opiates (morphine, codeine, and heroin)
Expanded drug tests are sometimes used, and check for these additional drugs: 6. Benzodiazepines (Valium, Ativan, Xanax, etc.) 7. Synthetic narcotics (hydrocodone, propoxyphene, oxycodone) 8. Methadone
Answer: When they do hair follicle testing, they can see your drug history. Which means they can go back as far as your length of hair will allow them and it usually takes about a week for what ever it is that you used to grow out into your hair, and unfortunately there is nothing you can really do about it.