If you must transport your medicine by car, this is how to do it.

Two rules:
Never give probable cause.
Never give consent.

#1: DO NOT UNDER ANY CIRCUMSTANCES smoke or drink before you leave the dispensary or on your way home. Never ever. Never EVER ever. If the officer has ANY reason to suspect DUI, that is probable cause.

#2: Do not carry your meds or tools in the passenger compartment of the vehicle. Stow them in a locked trunk or cargo area that is not within the access of the driver.

#3: Do not give consent to a search. If you have not given probable cause by crossing marked lanes, driving erratically, having visible paraphenalia or roaches in the ashtray, having very red eyes plus a smell of weed, stinking booze, or speaking haltingly, you cannot be accused of OUI!

#4: Be POLITE and SPEAK CLEARLY. Politely ask, "Why are you asking that I consent to a search (or step out of the car if that is the case)?". Clearly state, "I'm sorry Officer, I cannot give you consent to search my person or vehicle". These conversations ARE recorded and will be accessible to your attorney if you do get arrested and charged. If the officer cannot give probable cause to have done the search in the first place, any evidence that he finds in your vehicle is suppressed before a jury hears it, and with no evidence, the DA can't do poop.

Learn your rights, and practice with a friend playing 'cop' just as you would practice for an interview. A traffic stop is an interview of sorts, but you don't actually HAVE to talk to the officer! Of course, you need to use your judgement to decide whether silence would make the situation worse. Generally, being able to talk to a police officer calmly and politely, as someone would who has nothing to hide, will help you de-fuse any potentially bad situations.

If we are talking about moving weight here, that's not the purpose of these forums and smuggling talk will be removed.