I heard a good combonation therapy for trigenial neuralgia syndrome is gabapentin and oxycodone is that true? this personally worked for me

Could be: The key medication is the gabapentin. This medication is more likely to address the nerve pain better than the oxycodone. The drug of choice of trigeminal neuralgia is tegratol. This is very similar to gabapentin. Nucynta (tapentadol) may be a better choice than oxycodone given is mechanism of action. Ultimately everyone may responded differently to the same treatment so that plan may need to be modified.

Basically Yes: I personally favor other drugs of the Gabapentin class that have a more favorable side-effect profile and a faster onset on action. Nucynta (tapentadol) combines the feature of an opioid like morphine or oxycodone with a snri like nortyiptyline or cymbalta. The snri's can sometimes produce impressive relief of pain which originates from nerve damage.

Yes and no: The gabapentin, or other antiseizure medications like it, will usually do a good job preventing the shocks in your face. Oxycodone is a very addictive narcotic. If your symptoms are so bad you need narcotics, then you should consider surgery. I do a "keyhole microvascular decompression" which allows most of my patinets to go home the day after surgery, with over 90% cure rate and no numbness.