Chemistry help needed asap. opium. morphine, codeine, etc?

No problem. For pharmacology, a good place to start is Goodman & Gilman's The Pharmacological Basis of Theutics; this is an excellent referece work, and your local pharmacy may have a copy. www.erowid.com has some good information, as well as some more questionable information , but is still a decent source if you take care to verify your facts. For more clinical aspects of toxicity, you can use the eMedicine webiste. For structures, ChemBioFinder can help you; it requires a membership, but I believe that it is free.