I did give gabapentin/Neurontin a good shot (my GP wanted me to, it is cheap!) I took it up to 1800mg, but honestly, the side effects were horrible and I was not getting sufficiently good pain relief to justify putting up with them. So that was that, and I won't be trying it again.
Pregabalin/Lyrica is what gabapentin is metabolised to, within the body. I am sure it is a lot more complicated than that, but I've been told that's the short version of it. I've been told also that it is a lot easier with regard to side effects, in general. There are always exceptions of course, and you'll find people who swear by gabapentin and who can't take pregabalin, but in general it does seem to be the case. Unfortunately it is more expensive.
Topiramate was not something I had heard of until my lovely pain consultant suggested it to me. Yes, this combination is safe, remember I am taking these meds at a much lower dose than if they were used as an anti-convulsant. Pregabalin as an anticonvulsant is taken at doses up to 600mg, topiramate up to 500mg. I'm currently on 200mg and 50mg respectively, have been titrating the dose upwards and have paused at this level because I think - not sure! - think that this might be where to stop.
Anyway my consultant told me that this would be a very powerful combination and it seems he is right. I don't think that he suggested it particularly because of weight gain with pregabalin, most people don't gain weight with this med anyway. And although people do lose weight with topiramate, that is not with doses as low as I am taking.
So far I have neither gained nor lost any weight at all, my weight has stayed exactly the same.
No idea if any of this info is useful or not! - but there it is.
There will be lots of us here thinking about you tonight - and the days and nights to come - and wishing you well.
Please stay in touch.
![Smile :)](./images/smilies/icon_e_smile.gif)