What is good to take for painful nerve damage?

Nerve pain. There are some medications used to treat neuropathy. It can be anti-seizure medications like Lyrica (pregabalin) or gabapentin, antidepressants like cymbalta, or tca ...
A few meds. There are different medication on the market, particularly if the condition is painful. There is not one "best" one but rather there are a few and if one works you stick with it, if it doesn't you try something else. Some examples include: lyrica, (pregabalin) cymbalta, neurontonin. All are prescription products.