Brendan, welcome to the Forum.
Sounds as if his pain is not in control right now. When the meds are right then pain would be in control in one hour. Have no patience with pain. Report all pain sigs to the ER vet to adjust meds over the phone.
The pain meds are not yet right. Please contact your vet ASAP to advise of the pain that you're seeing so meds can be adjusted. Advocate that any of the pain meds be given 3x/day (every 8 hours).
—Methocarbamol works on the pain of muscle spasms VERY typical to neck discs
— Tramadol is the general pain reliever.
— Gabapentin works on nerve pain.
There should be no sign of pain from one dose of meds to the next. Have no patience with pain as it does hinder healing. Look for your dog to be acting their normal, perky self when pain is fully under control round the clock.
SIGNS OF PAIN:
◻︎ shivering-trembling ◻︎ yelping when picked up or moved
◻︎ slow to move ◻︎ tight tense tummy
◻︎ arched back, ears pinned back ◻︎ head held high or nose to the ground.
◻︎ restless, can't find a comfortable position
◻︎ slow or reluctant to move much in crate such as shift positions
◻︎ looks up with just eyes and does not move head and neck easily.
◻︎ not eating due to painful chewing or in too much overall pain
◻︎ holds front or back leg flamingo style not wanting to bear weight
◻︎ not their normal perky selves
With full details on each med we'd better be able to comment.
Pain meds: ? mgs ?x/day
anti-inflammatory carprofen: ? mgs ?x/day for how many days?
Proactive vets don’t wait til there is lip licking of nausea, not eating, vomit, diarrhea leading to serious bleeding ulcers, red or black blood in stool due to the extra stomach acids anti-inflammatory drugs cause.
Pepcid AC (famotidine) blocks the production of acid. The usual dose of Pepcid AC (famotidine) with a disc episode is 0.44mg mg per pound every 12 hours. Pepcid AC has a very limited potential for side effects.
Ask if your dog has any health issues to prevent use of Pepcid AC (famotidine)? (doesn’t need it, we wait til there is problem…are NOT answers to your question!) If you get a “no health” issues answer, then go to the grocery store to purchase over the counter Pepcid AC containing one single active ingredient (famotidine).
HEALTH ISSUES: “Mar Vista Vet reports: Pepcid AC has a very limited potential for side effects, the reason of release to over-the-counter status. The dose of famotidine may require reduction in patients with liver or kidney disease as these diseases tend to prolong drug activities. There have been some reports of exacerbating heart rhythm problems in patients who already have heart rhythm problems so it may be prudent to choose another means of stomach acid control in heart patients.”
marvistavet.com/famotidine.pml 
