Hey
Im not a vet as it is, and I already notice how different the drugs are in Norway compared to what I was used to in Belgium.
So.
Take the following with a bucket of salt:
ACP is commonly used to sedate. If it is the same drug that I am thinking of, it used to be used for New years to keep the dog etc quiet. Personally, I'm not a fan of it. It is a drug that knocks your animal out on a physical level, so they can be handled better (and dont freak out the owners with their unwanted behaviour). However, if memory serves, it does not sedate them mentally, and they are still aware of the environment, only now, they cannot express their stress or fear or act on it.
It is your call, as it will make Jack putty in your hands, and from what I remember, they are fine in a day or so.
Personally, I'd stick to just feliway and your scent, considering how Jack responds to you. At the clinic, we also used to sell like homeopathic drops you could start a couple of days in advance to build up a calming response. For my trip, I ended up using a valium derived food supplement on Faith that I'd build up beforehand, to take the edge off. Granted, she could have probably benefitted from a more heavy sedation considering the amount of hyperventilation she went through, but I honestly decided against ACP as I did not want to trap her with her fear in her own body (Id only use that if they are a danger to themselves or others, tbh), just for my own comfort.
Again.
I AM NO VET. And it is coming up on 8 years since I officially worked in a veterinary clinic, and animal medicine has changed a lot since then. So maybe this is a more modern version. And I am from Europe, so your drugs are going to be a little different, as well as the prescription methods.
But in my very humble experience, I find that vets prescribe this drug to reassure the owner, and not for the benefit of the animal, in most cases.
I'd honestly ask my vet about it, ask her how exactly the drug works. Then you can decide what you want to do.