 So, how could you potentially get in trouble for either being in possession of a controlled substance or being under the influence of a controlled substance? Now, when it comes to driving under the influence, most people automatically think alcohol. Some people aren't even aware that you can get a DUI for something other than alcohol. But in Florida, it is possible to be arrested for being under the influence of a controlled substance. Now, interestingly, that could be your own prescription. So just because you have a prescription in your hand doesn't mean you can get out of a DUI. If you are still impaired by that controlled substance and you should not have been driving, an officer could still potentially place you under arrest for DUI. Now, as to being in possession of a controlled substance, one of the most important things to remember, keep your prescription on you. I would say 9 times out of 10 when an officer goes to ask somebody, do you have a prescription for that? Even if you say yes, you tell him who your doctor is, you tell him where you got it from, how often you take it, where the pharmacy is that you pick it up from. The officer is still going to place you under arrest if you don't have the valid prescription. Keep a copy on your phone, keep a copy in your car. If you actively have prescriptions that are controlled substances, don't forget to have access to that prescription.