I am actually surprised by this, but it feels like SWIM's having a strong GBL rebound effect from stopping kava. I have been using kava kava extract to sleep regularly for a while (probably nightly for about 2 weeks). SWIM's dose of the extract powder has gone up quite a bit, and I was worried that I was using too much and had developed a tolerance. Since stopping, it feels like I am experiencing a dopamine rebound like when I would go too long with GBL without stopping. Really nervous, with agitation, anxiety, and this really distinct feeling which I get from nothing else. I had been reading a while back that there has been a growing problem with addiction to kava in Australian aboriginal populations. Here's one link discussing the subject - https://drugs-forum.com/threads/26523 I think this is the only population currently abusing kava. The part about hypertension and collapse in heavy users is particularly interesting, since this is a common problem with heavy GBL use due to dopamine rebound. SWIM once thought of kava as a benign and subtly effective drug, but after reading about it and trying some effective extracts, I am finding it not so benign and not so subtle.