K2 is a complete and utter waste of money. It is essentially just a mix of herbs sprayed with the synthetic compound JWH-018. This can be found in a pure form for a fraction of the cost of K2. I believe a gram of k2 goes for around 60 dollars, while a gram of jwh-018 is around 45. Considering the doseage for JWH is only 4mg you can clearly see how much better of a deal this is.
Now, with that said, while JWH is amazingly close to the exact feelings of THC I dont like JWH-018 particularly because of how many negative side effects it has. It is extremely easy to over dose. When you do, prepare for a world of hell. Ive experienced it quite a few times. On the lower end of the over dose, you get a horrible head ache and it literally feels like your brain is on fire. If you go a bit farther than that though, it gets a whole of a hell lot worse. By this, I mean you spend the next hour or so throwing up. And its the most voliently ill sickness you will ever feel. Most times you expel whatever is in your stomach pretty quickly then spend the rest of the time dry heaving. I must say though, leading right up to this its very reminiscent of DMT and even during the vomiting you have the most intense closed eyed visuals, but the ends clearly dont justify the means.
Now, there are however other synthesizes of JWH that are better. From what ive read JWH-075 is pretty good, but the best, and my favorite is JWH-250. No matter how much ive taken Ive never experienced any real negative effects. The worst I ever got (and this was when i messed up and put way to much) was getting really cold for 30 min then the effects faded and I was fine again. JWH-250’s effects last for about an hour, its a bit more intense than 018 as well. I very much liken it to how I feel right after smoking a bong with some really nice haze. But like I said it doesnt last nearly as long as the nice haze would.
Are there long term negative effects to prolong useage? Maybe. Its a possibility, these chemicals havent really been around long enough for proper testing. IMO these chemicals should never be used as a replacement for marijuana because they simply arent. Try as they might, its never going to be the same. I do think these are particularly useful though for those that need to give up smoking for a short period for probation or work drug tests. That is how I think one should go about using these compounds. The other really nice thing about them is the stealthiness factor. If you roll your own cigarettes, which I do occasionally, you can easily put some of the compound in with the tobacco and smoke anywhere without arising any suspicion what so ever as they dont put of any kind of smell when vaporized.
Recently I looked into the molecular structures of both THC and JWH-018/250 to compare how close they were. What I found was kind of surprising though. They really arent alike at all yet produce similar effects in the brain. What I also found interesting is to my surprise (i dont know why I never looked at THC before:P) THC is a terpene. I would have expected it by all means to be an indole like 018 and 250 since indoles are the class that holds LSD, LSA, DMT, psilocybin, and most other hallucinogens. Dont know what this realization could mean, but interesting non the less.