It really depends on what's causing the nausea. Dogs will usually start to lick things like crazy and drool when they get sick and they want to vomit. It brings it on and this makes them feel better.
In this breed, I would also be concerned that you are seeing seizure activity with all the lip licking.
I would go ahead and see if you can get some really bland food into him. I would start with about a tbsp of boiled chicken and white rice and see if this helps with the nausea. It will usually settle the stomach.
Then, if you don't see any results, you will want to give the vet a call.
Let me know if you still have questions.