do not have adequate training to counsel on vitamins/supplements.

I never read the % portion of the labels. They typically are meaningless, and mostly just alarm people.

The % are based loosely on the RDA --and even now most
research people believe that our RDA is very antiquated and out of date.

The average dose for thiamine is 100mg 3 times a day for
neuropathies, or for those who consume alcohol. Thiamine is very benign in high doses. I am unaware of using it with morphine for what you are intending.

As an example, B12 %s can show up on labels in the 100,000's ranges. Very little oral B12 is actually absorbed, but that label scares off many people who really need it.

The only B you need to watch is B6... don't go over 50mg a day on that one.

Keep this link:
http://lpi.oregonstate.edu/
It has the most up to date information on nutrients on the web.

And I do not think that pharmacist is going to call anyone.
That answer is just to placate you.
You can call that manufacturer however...I've done several different ones many many times! ;