Resting heart rate us 100+ BPM (Tachycardia) with Ritalin / Adderall.

I'm in my mid-twenties and have been on ADD meds consistently for about 6 or 7 years. I have switched from Ritalin to Adderall, then to Vyvanse for about 5 of the years, and then recently back to Adderall and now Ritalin.

This summer my doctor mentioned my high resting heart rate. The nurse had measured it at 114 BPM resting that morning. Dr told me to lay off caffine while on Adderall. I cut caffine completely, but the next time I came in during October my resting heart rate was actually higher than it was months prior, at 117 BPM.

I was very concerned and I began to wonder how long this had been going on. Records showed that I've had a higher rate than normal for a while, during my time on ADD meds. I had an average of 84 BMP in 2015, and 94 BPM between 2016 and 2017. But since January 2018, I've had an average of 105 BPM, and only once had a resting rate lower than 100.

So in October I began cutting my doses down, while continuing to stay off caffine. I also began (trying to) exercise somewhat regularly. During this time I also switched from taking Fluoxetine (Prozac) to Celexa, for anxiety and depression. My heart rate did go down after all of this, but still, my resting rate was often still over 100 BPM when I checked it on my own. When I went back to the doctor in November it was at at 104 BPM.

I also asked the Dr to switch to another ADD med, because the thought of having a high resting heart rate was stressing me out. So, he switched me to Ritalin.

For the first few weeks the switch from Adderall to Ritalin (and/or Fluoxetine to Celexa) seemed to lower my heart rate. While it was still higher than normal, my resting rate was regularly in the low 90s and high 80s, give or take, only occasionally rising to the low 100s. But then, it began increasing again, without any change in dosage of anything.

It is now back to a resting rate of 100+ BPM when I'm on the meds during the day, and around 80 BPM when I wake up in the morning (before taking the meds). And cutting or even halfing the doses seems to have little effect on that.

The Dr said he would typically prescribe beta blockers to deal with the fast heart rate, but said he wasn't comfortable doing that since my blood pressure was so low.

Because of all of this, I had blood work done, which all came back normal.

Unfortunately, I'm not sure I would be able to function without ADD meds. Though my Dr said he wasn't "too concerned about 104 BPM" I have find myself obsessing and really stressing over my rising heart rate. Googling the issue hasn't made me feel any better.

Does anyone have any advice or insight?

How abnormal is this and how worried should I be?

Why might my resting rate be going up even while I've gotten used to the medication?

Is there an effective ADD medication that doesn't have this side effect?

Any and all input is appreciated.

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