420marijuana, I am sorry to say this but you are completely wrong. Opiates are part of the basic tests as you will see in my response plus they don't get the verification for prescription meds until all tests are run. Home tests are accurate but not quite as accurate as lab testing. Lab tests do not use shitty testing. They are precise and accurate. Xanax wasn't in question here either. Also they aren't testing blood, they are testing urine. Detection times for drugs in urine and blood are different. You can actually pass a blood test for many drugs but fail the urine test because the kidneys reconcentrate the metabolites in the urine. No hard feelings please but I had to give the OP the correct info so I had to show the flaws in your response.

Now This is what is going to happen. You will get tested for at least the big 5, THC, PCP, cocaine, amphetamine, and opiates. They can chose to test for more but you will get tested for at least these. The test will first undergo immunoassay testing as well as validity testing. Immunoassay technology is what is used in home tests. Home tests are quite accurate nearly 95% so if you are passing THC home tests you will probably pass the lab immunoassay. Although it is similar to amphetamines in how it works and why it is prescribes, Ritalin is not an amphetamine so depending on if they are testing for more than the big 5 you may or may not pass the immunoassay for Ritalin. Depending on which opiates and the dosages, if you have taken them in the last week you will probably get what is called "nonnegative" on immunoassay for opiates. The lab will then have to confirm the sample for opiates so it will be confirmed using GC/MS. They will retest another portion of your sample for all the drugs they juste tested the sample for with immunoassay using GC/MS. Immunoassay uses a 50 ng/ml cutoff for THC while GC/MS uses 15 ng/ml cutoff for THC. However immunoassay looks at 31 possible metabolites of THC while GC/MS looks at only one metabolite, THC-COOH because there is only one reason why you can have THC-COOH in your urine, because you used marijuana. It will eliminate any possibility of false positives too. So now I know you are worried about this and you probably saw bits and pieces of GC/MS and immunoassay on the web and maybe this site. What you probably didn't see is that because immunoassay is looking for 31 metabolites and GC/MS is looking for 1 metabolite, these levels correlate to pretty much the same thing. If you are passing immunoassay for THC metabolites you will probably pass GC/MC for THC metabolites. Nothing is certain but you should pass. You will fail for opiates once it goes to GC/MS. The MRO will then call you to verify you have valid in date scripts for the opiates. If they did look for Ritalin the same thing would happen as with the opiates, but like I said not all tests look for Ritalin metabolites.

So what can you do? If you passed 8 days ago your level has probably dropped in half because the half-life of THC is anywhere from 0.8 days to 10 days depending on the person. You can do a mild dilution if you want to help dilute your THC metabolite level. You can sub and just pass for everything. You could stop taking your prescription meds if the test is in a week or more. I can't tell when your test is or if you have taken it, you are a little unclear.