Actually the "code" language is overrated. If a drug addict or drug seeker or forger really wanted a drug, it would be just as easy for them to copy the prescription that was previously written to them in "code."
Most heavy-hitting narcotics, depending on what state, country, province, have to be written on special prescription pads. Triplicate, duplicate, or non-photocopyable etc. Most prescription doctoring is usually due to changing quantities or verbal forgeries. Sign your prescriptions. Print in english the quantities in addition to numerically. Only use your DEA number when necessary. Remember the DEA is only for the scheduled stuff. As dentists we will prescribe what is within our realm of practice and what is reasonable for the condition being treated. Whether or not we trust our patient is irrelevant if we follow the precautions, review med history, check with their family physician, etc. Trust no one is a good rule. The pharmacist, if doing his job, is a good allie. He can alert you to errors, duplication, alteration, interactions, drug seeking behaviour etc.