Hi Liz,
Welcome to the Pain Management forum at Medhelp. Yes you may check with the substance abuse forum but you question is fairly easy.
If you husband has a narcotic addiction that would include codeine. However his drug of choice is probably percocet (oxycodone). Codeine is not nearly as strong as oxycodone and I assume his PCP is aware of his problems with oxycodone. Indeed it would take many codeine to compare to one oxycodone. His PCP may have prescribed him only enough for several days. If his physician felt he required the drug for pain he may be cutting him some slack.
I have a friend that can handle hydrocodone without a problem but he can't handle percocet. He may be rare but it appears to be true for him.
I would make frequent calls to my children while they were with daddy to check on their well being if you are concerned. Good luck to you, Tuck.
This is Pain Management forum. What you are looking for Substance Abuse forum, go here:
http://www.medhelp.org/forums/show/77