Hydrocodone works
Not sure what dose you've given of this
but I gotta chime in a word of advice.......
be VERY VERY VERY and did I say VERY careful giving a dog hydrocodone. We have treated dogs before that got sick from accidentally ingesting this. Buffered Baby Aspirin is the only thing over the counter that is commonly given to dogs. There is Tylenol in Hydrocodone that is also harmful to dogs. I've actually never heard of anyone giving a dog Hydrocodone safely.
Some human drugs are safe and used in dogs, but even more human drugs can be very harmful.
X2. Most human drugs r deadly to canines. Human meds r given to dogs but in way smaller dosages.