While it is better to be off GBL(I found it pretty addictive, couldn't just take it occasionally)l those physical problems that people mentioned on this thread were mostly likely to do with other conditions/causes....I was taking it for 6 years solid, 1.5 ml every hour approximately, perhaps every two hours at night. In this time I held down a pretty good job.I never had any health issues, even had a cold. In the end though you become so tolerant that you're just taking it for the sake of it, very little euphoria, though still helped reduce anxiety, inhibitions etc and increased sex drive etc( that can be wearing on the people around you!)
In the end though the overriding effect was it made me a bit too sleepy, so I just thought I'd stop. I'd tried to stop before with the help of Baclofen and valium, and did for a week or two but because a friend still had some gbl available that was too tempting. Finally after our stocks ran out, we all stopped. This time stopped without valium or baclofen, and it wasn't a big deal.the only feeling was like I was coming off a six year bender, my brain felt like it could do with a damn good scrubbing (sorry I can't convey the feeling any better than that!)(maybe that's the signng the of neurotoxicity, which is all I've ever found while trawling the net which is a negative medical effect of gbl.never seen any evidence of damage to the stomach with gbl.have had blood tests throughout this period and nothing unusual shows up....and I'm 50 so hardly a spring chicken. Good luck anyway.