Hey Joe, curious - your title says "EMT Student" - are you asking about ways to handle class or down-time on shift?
I have ADHD. I wasn't diagnosed until mid-college career. I took meds (Adderal) thru college and for a couple years after. Made a HUGE difference for me, but took a lot of tweaking to get the dosage right. I was not on them thru paramedic school this last year because I didn't have insurance and couldn't afford it. But, I have learned a lot about ways to adapt over the years and what helps me focus enough to study. If you're having trouble in class, shoot me PM and I can give you some things that have worked for me.
If it's down-time on shift that you're struggling with, I can totally relate. I HATE slow days! Sitting around waiting drives me crazy. So I keep busy. This last year I pretty much always had studying to do for medic school, so that helped, but I can only sit and study for so long. I always keep shoes and pt clothes in my locker and will often go do some laps around the station (or the bay if it's cold/nasty out). I'll run the stairs up to the training lab, hit the heavy bag out in the bay, push-ups, sit-ups - anything to get my heart rate up and burn off some of that energy. Granted, you can't do that if you're on the bubble, but it's a great thing for anybody to do for many reasons if you're down the rotation. I also keep a squishy stress ball in my locker that I can play with, keep my hands busy, without making a bunch of noise. Good to use when watching tv or something. I also spend a lot of independent time up in the training lab practicing skills. It's productive, can never practice too much, and keeps me busy and not pacing/fidgeting in front of crew mates. On the more humorous side, I also have a sizable collection of candid photos of me and all our training dummies in all sorts of places and situations around the station, haha. I'm currently in a smaller rural system, so I have to get creative, and yeah, some days I feel like I'm going crazy, but you can make it work.
Just a thought, career-wise, maybe think about what type of system you want to work in. Sure, everybody has down days, but you can pick a type of system that averages a higher, faster pace. I know that for me, the system I am currently in is not ideal. During externship I spent time in a busy urban system that runs system status. I loved it. 14hr shifts instead of 24s and I was almost always busy and the scenery constantly changed as we moved from post to post around the city. So, in my hunting for a more long-term job, I am looking for a larger urban system to work in with lots of different facets and opportunities. This is because I understand how my brain ticks and how and where I function best. I know that I need variety, continuous mental and physical challenges, and a faster-paced environment.
Personally, I see my ADHD as an asset, almost an advantage, working in EMS. Yeah, I can have a short attention span and be easily distracted. But I also have the ability to "hyperfocus", or focus in extremely intently on one task or situation. I also focus and perform best in high-stimulus, high-stress, high-pressure situations - it actually calms me down in a way. Meaning, in EMS, when I need to be focused, I am. I handle pressure much better than most. I also have a very strong sense of empathy and am easily able to read people's non-verbal cues to figure out the bigger picture. It makes me more able to connect with patients. What you need to do is learn as much about ADHD as you can, learn about the different types (me, I have "high-stim" ADHD) and how it affects you. A great resource for me has been the book Driven to Distraction by Edward Hallowell & John Ratey, both psychiatrists with ADHD. Another good book is ADD on the Job by Lynn Weiss, it has lots of suggestions for adapting at work and also helps give you the perspective of people trying to work with you.
EMS can actually be really great field for a person with ADHD - a field where you can put a lot of your unique strengths to work. As a matter of fact, I have found that since working in the field, I have not really needed medication. I still struggle sometimes, but overall, the slightly chaotic schedule and demands combined with the paramilitary-type structure really works for me. That - and a little growing up and taking ownership of my limitations. If you're serious about figuring yourself out, read that first book for sure. And if you have any questions, feel free to PM me. Remember - ADHD isn't a disease or some sort of affliction - it's simply a different way of wiring the brain, like being left-handed. You just have to understand it.
Good luck!
*edited for formatting