I would actually just wait and push through the numbing. I've taken monster doses of Lyrica or Neurontin combined with Gabatril and have had various numbing episodes that I kind of enjoy. Read the wiki page for Gabatril. It's very similar (side effect wise) The numbing is usually in my hands but here's the thing... If you guys really push your dose combined with Gabatril,
http://en.wikipedia.org/wiki/Tiagabine you will get to a certain threshold where you have cognitive delays. If you don't know what a cognitive delay is, it's like you're kinda stupid, you're in a conversation and you're trying to think of a word, it's on the tip of your tongue but you just can't think of what it is. Finally, you think of the word but you spit it out within the conversation in an awkward way, almost like your tongue just got a shot of Novocaine. Edema is one of the main side effects with these GABA drugs I'm speaking of. Sometimes on real high doses of everything, I get edema in my limbs. My rings won't fit right on my hands. Their kinda swollen and water retented. At that point if I have bad edema and cognitive delays, I need to cut back because I'm walking around talking to people... and from the outside I look like a blithering moron. In the psych community, Neuronton combined with Gabatril gets you cognitive delays in higher doses and they call the drug "Morontin" since you look like a moron from Neurontin's GABA properties hitting your frontal coretx and making you talk and look like an idiotic fairy!
An example of my cognitive delay would be me going over to my girlfriend's condo and getting inside. She says Hi. I say, "I went and checked the ummmm um ummmmm...... OH YEA, THE ...MAIL. " But when I finally think of the word mail, I spit it out like a blitering moron. At that point, my girlfriend can tell I'm running a little stack of Lyrica and Gabatril. She'll prolly tell me to back off my doses and I will. At that point, the edema goes down, I get rid of the cognitive delays and proceed forward with whatever I want to do.
I'm tellin you guys, You gotta stack this stuff (Neutontin or Lyrica) with Gabatril. It's the sacred key to busting through this dreaded tolerance that Neurontin and Lyrica have hidden within them. Don't you guys hate that hideous tolerance that comes with these drugs. and you have to dose like every 45 min because of that stupid bottle neck amino acid transporter?! Like 36 hours of a buzz and then it's bye bye until you clear your receptors (for me that seams like 4-5 days). Then I can hit it again. However, With Gabatril you don't have that. You can get that GABA buzz everyday for as long as you want. When I get Gabatril, I make sure I get it in 4 mg tabs. I usually take 16 mg at a time but it's kinda like GHB, it's easy to overshoot the mark where you're almost like G'ing out. I've done alot of GHB and It's one of my favorite drugs. Gabitril has similar G'ing out properties so there's that dose threshold that you have to play with a little bit until you get used to it. If I'm on a good run (like a cycle) of it, I would guesstimate that I take maybe 16 mg in the morning and another16 mg in the afternoon. For all you crazies like me

Gabatril should be a staple of your crazy meds regimen!