I also meditate and I can see that some types of meditation instructions could do this. Other types of meditation are just being mindful and aware of your thoughts--not trying to do something about them. Have you tried approaches like this, combined with intentional breathing?
Actually it's mindfulness I have a problem with. It does something to the energy in my brain and this can't be sustained. It may well be doing house cleaning of some sort, but the excitation produces a worsening in my condition. From my experimentation with norepinephrine re-uptake inhibitors I'd say that it's NE that is partly to blame for this paradoxical effect.
I've been doing Gupta's main exercise and it seems to be calming my wiredness quite well. I believe it's working on this norepinephrine system. I had a longstanding NRI-induced sexual side-effect lift within a couple weeks of starting Gupta. I'd had this problem for a few years. Just about all cleared up. So I've no doubt the main Gupta technique lowers stress hormones. Something I'd not been able to manage with any other relaxation/meditation approach. I'm also seeing immune strengthening effects resulting from this.