None of my doctors or pharmacists really knew anything about what pills could be crushed and put down the feeding tube except for Christine's advice about time release. (actually you can crush TRs also but you get the dose all at once - I've done it)

Instructions and the PDR aren't accurate either. The pills I now take crushed down the feeding tube (Lipitor, Vitamin D, Levoxyl) explicitly warn not to crush them, but my blood work shows that they are doing just fine. That's the basis for my comment about doctors and pharmacists knowledge - they only knew what they had read with zero personal experience. Vicodin clumped and clogged my tube, Percocet was just perfect as well as Oxycodone but I'm off them now.

One thing that will NOT work: anything in a "soft gel" capsule. Even with an exacto knife split and careful "milking", it's a mess that does not work down a tube.
Finally, your post inspired me to actually check Dr. Google and I found this very helpful site.
Medicine thru feeding tube
We have the red hard pill crusher shown on that page we bought at Safeway pharmacy for a few bucks.
It's easy once you get the hang of it.
Charm