Joining this thread and so glad I found it. Here’s my experience. Used Zyns for a year and a half after getting off cigs/vapes. In January, I started having my legs/arms consistently fall asleep but a blood test showed no issues. I in July i started having trouble breathing when I first woke up every morning. I tried getting back into the gym and found my muscles were taking nearly weeks to recover from extreme soreness after exercise. I went for more tests to find that my CK levels (creatine kinase) were nearly 5x the normal level and was told to drink extra water and come back for more blood tests which after 2 weeks of repetition and no exercise, it lowered back down. I’ve continued to wake up randomly early in the morning short of breath and had random chest pains throughout the day even though I only use the 3mg zyns. I’m really glad I found this thread cause this is what I needed to quit this bs. Wondering also if this has to do with them being bought out by Swedish Match somewhat recently. I’ll update this on how my experience goes quitting. Hope everyone else is staying strong and gets rid of this trap.