Maybe there is something to this. I didn't have a long run with coke...mostly because my guy seemed like he had too many customers and was getting drunk way too much after work, where he would take orders, it was delivery service...back in 2008, usually the best stuff is delivery and the kind of structured delivery too, where you had certain hours where you could call. Anyway, the guy had the purest rock when crushed was fishscale quality, it was amazing, and not too expensive either. I had been having issues of tachycardia even before I got into the solitary habit of turning it to freebase and smoking it with baking soda or ammonia. Freebase is so amazing but I think that, although I wasted about the price of a good 4 wheel drive subaru sedan in 8 months on calling everyday and thankfully I had lived very close to him in the first place.
I think my prescription of Verapamil for quasi-high blood pressure and reduction of tachycardia and also an admission to an ER doc that I wasn't able to enjoy weed anymore and 3/4 of the time it just ended up giving me chest pain and tachycardia although I was mentally addicted so he told me, well worrying for nothing isn't good for your heart either and gave me a year's worth of verapamil, which is a calcium channel blocker. It made it so I never practically had tachycardia, even after smoking a gram a night of freebase i'd make myself off that really high quality to start with cocaine hcl, I never felt like I was gonna have a heart attack like so many people from doing this, I could smoke 3.5g in 2 days and just get the extreme euphoria, although lasting 5 minutes...it made time dilate and if I was feeling like looking for pieces of my dried freebase cook that might have fallen on the floor (which happened maybe twice in that 8 month stretch), I had a whole lot of 4mg risperdal that someone gave me and I took them in case I had some kind of psychedelic bad trip. They had been in a drawer for a very long time but I found a use for them...4mg is a large dose, I split the pill in 2 at the score line, and did that again with those 2 2mg parts and again, so I would have approximately 0.5mg risperdal which I think is the lowest dose. It worked at killing all the dopamine craving and depression one often gets after cocaine. So, let's say I was well equipped to go on a freebase 8 month rampage, it didn't damage me at all.
As for amphetamines, I had a prescription for Dexedrine 10mg spansules x 2 in the morning + 2x5mg IR at 3-4 pm for when I had a lot of homework or to get some energy to be able to handle an evening job after school. What I found really reduced a lot of the bad feelings that can be caused by amps, whether psychosomatic or real, for the time I had that prescription in the 4 years of my BSc. that I finished, well, benzos obviously helped, but otherwise, I can say that low dose inderal helped, a lot, 10mg IR as needed when I had too many PNS symptoms, yes, they still exist with pure dexamphetamine, it's a lot less crappy than with Adderal XR where I heart thought I was running a marathon due to the levo-amph. I wish we had Tenex then. I wanted to switch to Verapamil again when I read a lot of evidence like the evidence presented in this thread, but my doctor refused, saying I would need to stop Inderal point blank as you can't mix beta blockers with verapamil, whether it is because it is a calcium channel blocker or for something particular to verapamil (it seems like it doesn't mix with a lot of things) I don't know. I just wish Tenex (guanfanacine) was available here. Now it is, for mostly children with ADHD, and only as an extended release medication, Intinuvi XL...those proprietary drug names, they're starting to run out of ideas heh. And it is not covered for people over 18 unless your doctor has a lot of documentation on treating you with other stuff without success or not enough success, like for Adderal XR and Vyvanse..well that one isn't covered even for children unless other things have been tried before and your doctor fills a form to have the government medication insurance pay for it. Adderal XR 25mg was really expensive, in Canadian standards, the 2 months i paid for it then realized Dexedrine did not need any sort of government approval at the ministry of health doctor bureaucrats. When I got the letter I couldn't get "Mix of 5 amphetamine Salts"..I just printed the evidence and I learned how Dexedrine is the first line ADD medicine here when Ritalin and the extended release Biphentin or Concerta didn't work/the person doesn't tolerate MPH at all, as was my case (psychosis from 20mg of ritalin a day when I was 17...took a good 3 months to feel normal again without medication, also some kind of seizure issue that I described to a neurologist who made it official that I did not tolerate MPH and didn't use amps for a long time before giving them a go to finish once and for all university.
I can attest that Verapamil made it so that cocaine was much less of a problem than the few times when I made myself some freebase and had no more a script for it where I though I was gonna be stroking heh (and I stopped on Jan 19th 2009 to smoke it, although I doubt my guy had the shit, but levamisole tainted coke was getting big with posters here inside ER waiting rooms about it). I wonder if that ever stopped, but that's for another thread.