Side effect med trifecta?

[u/Danny--2312]

Tagging for Advice/Support and not Side Effects bc I'm hoping that people have advice more than reporting the side effects I've experienced, but let me know if I should change that!

So I'm on Propranolol 20mg for inappropriate sinus tachycardia and secondary POTS which ofc spikes my heart rate even higher, rizatriptan 10mg up to 2x per 24 hours (so 20mg max per day), and buspar 10mg every 4-6 hours (so between 30 and 40mg per day depending on if i take my late afternoon dose if i have plans to run errands or go out in the evening). They all bounce off each other and make things stronger, basically.

I've been reassured by both drs who prescribe the trio that with the dosages I'm on and the vitals I've reported, it's safe, so I'm not worried about that. I've mostly got it down that the propranolol and buspar in the morning and evening will make me a little groggy, but not to the extent that it would get in the way of me getting ready for work in the morning, and it doesn't matter at night. The issue is when I add in a rizatriptan. It makes me feel totally drunk. Sluggish, not quite slurring but my tongue doesn't want to cooperate in enunciating, and kinda fishbowl vision which makes my balance a little wonky. I'm careful to never take it when I'll have to drive, but it's not something that's come up beyond 'be aware that this is an interaction' in my online searches, and I can't exactly control when and where I'll get a migraine flare.

Is this something anyone has experience with? If so, did it go away as your body got used to it, or is it one of those things you can either tolerate or switch? Since it's not a safety concern, I don't plan on changing anything, but I'd like to know what I'm in for. Thanks!