Doctor shop? what does that mean?
Doctor shop is okay as long as you are not engaged in "drug-seeking" behaviors (U.S.standards) because the DEA is tracking narcotics and ephedrine use at pharmacies so you would be caught.
If doctor shopping for a physician you are comfortable with, no problems.
ultimately you will never "get away with it"..........it will catch up to you one way or another, sooner or later........maybe when you are seriously addicted and end up losing your job, or having a car accident, or hurting someone.........try www.soberrecovery.com for help.........or narcotics anonymous
We have computers that track that where I live.