Gabapentin (Neurontin) and Pregabalin (Lyrica) are indeed useful and even recreational drugs. There are a couple of important points to note. While the end effects are almost indistinguishable when taken in equipotent doses, Gabapentin's bioavailability fluctuations are make it an inferior drug in comparison to Pregabalin. A large meal, high in lipid content is required to get the most effect out of Gabapentin, which, when dopesick, can be quite a challenge.
Other than that small caveat, both drugs are pretty similar in both their recreational and utilitarian purposes. One must be pretty careful about tolerance however, as it can rise exponentially with repeated recreational dosages within a short period of time. There's nothing stopping a person from gobbling down a month's worth of either in 3-5 days. Take it from someone who's been there and done it. If you have an addictive personality, it would be wise to give your prescription to a trusted person and have them divvy it out weekly (~2 days of getting high, followed by 3-5 days of recovery and tolerance reversal).
Damn 'Chase', 800mg po x5? That's a nifty little dose of Gabapentin.