Since this ltc I feel like I react differently to stuff like alcohol, or my adhd medication and caffeine, on the cardiovascular side. I've been wondering, if maybe I go to the dentist or I get hurt and I go to the hospital and they prescripe me something like codeine or morphine, or they give me anasthesia. Does anybody know if i'll react badly? I'm just planning ahead here.
I too noticed that, while experiencing 'LTC' symptoms, any drugs which exert a mind altering or intoxicating effect on the user (such as Alcohol, Diphenhydramine, Morphine, etc.) regardless of legality or use as medication clearly affected me differently.
For example, I remember the first night that I got drunk after becoming ill with the aforementioned illness. I remember it so well because it almost felt as if I went from sober straight to the hangover.
In other words, drinking booze would cause me to feel like shit - no more pleasure derived from it at all. It's as if the Alcohol amplified some of the 'LTC' symptoms - particularly the uncomfortable awareness of my heartbeat, but I digress.
On the other hand, Opioid Analgesics such as Codeine, Morphine, Oxycodone, and so forth offered me an enormous amount of relief from my symptoms. I'd like to stress however that, considering this possibly well-intentioned but irrational and ultimately disastrous war on (people who prefer certain) drugs, and the burden it has placed on absolutely anyone looking to obtain any type of agonist which binds to the µ-opioid receptor in order to self-medicate (by way of international treaties, the DEA, drug scheduling, et cetera), I'd stay away from them because of the risk of dependency and possibly also outright addiction.
Re. other drugs - I've had extensive dental work performed while I was sick with 'LTC' symptoms. I was injected with a lot of Lidocaine (freezing), but it never made me feel sicker at all, so you should be good there.
I tried using Marijuana a couple of times while sick, and both times it resulted in massive panic attacks.
Also tried using a small oral dose of Methamphetamine one time while sick, and it also resulted in a panic attack.
Again though, you should be okay with Lidocaine (freezing/local anesthetic), Benzodiazepines, and also Opioids such as Codeine and Morphine. Again, you might find that the Opioids do such a good job at temporarily relieving your 'LTC' symptoms that you'll wanna stay on them indefinitely. And if I was your doctor, I would completely understand considering that I've personally been though it myself. Unfortunately however, 99% of physicians will probably sooner or later show you or I the door in such a case. And even that would be okay I suppose if it wasn't for the issue with severe withdrawal within hours of the last dose if becoming dependent on the Opioid(s) used (it's easier than one might think to become hooked).
Benzodiazepines should also make you feel better (especially the anxiety, insomnia, panic attacks, etc.), but again, they can cause a physical dependency to develop and also be habit forming. And again, the fact that all of them are considered controlled substances doesn't help much if you run out and can't get more from a friend under the table, so to speak.
All in all, the worst of them all would have to be Alcohol, believe it or not. I'm not exaggerating when I said that it felt like going straight to the hangover.
Good luck with everything buddy - I'm truly sorry you and so many others have (and/or had) to deal with this shit. The memories stay with me years after I recovered - that's how traumatic the experience was, but at least it now reminds me to be very careful with my health.