Review about Naltrexone

I tried naltrexone at a low dose of 4.5 mg dose years ago, and it had no effect on my pain levels. But at a higher dose (I started with 24.5 mg and now take 50 mg) it is extraordinarily effective. I'm thrilled with this result, but I worry about the long-term effects, so I do not plan to take it indefinitely. The side effects - energy, a spacey feeling - I find pleasant. But this also makes me worry that perhaps this is just another painkiller, and that I'll build up a tolerance and be worse off when I try to wean myself off it. It's promoted as safer and non-addictive, but not enough is known about it yet for those claims to be trusted. It perplexes me that naltrexone is an opioid antagonist, but it feels slightly like an opioid to me. So I'm trilled to have relief from the pain, but I proceed with caution.