Weird Predicament

Hi ya everybody. OK my hubby is up for a REALLY GREAT JOB.....Well, who here isn't huh???
Anyways, we used to be heavy smokers until we decided to have a kid. Or I should say until the kid decided to have us....... :) almost 6 years ago...So we have not smoked since then...
Well Thanksgiving my dear sweet hubby decided to smoke. He only took about 3 or 4 hits.
Well Now in order to get this new job he has to go take a hair test. I have been reading posts here and feel pretty confident in the MacCuj0 treatment. So I already got the stuff and we are going to do that for the next few days. But the thing that I am really worried about, is My hubby had surgery this past summer. He had Morphine at the hospital, and was on Vicodin and other pain killers for about 3 months afterwards.
Should I be worried about this? I feel like he should tell the people at the testing place about the morphine and other stuff, but then what if they do the test and don't find anything at all because of the MacCuj0 cleaning system. And then question it......
Can anybody alleviate my fears. Or tell me what we should expect....
Thanks so much!!!