Thank you both! I'll ask the vet about both compounding and the gel caps. There may not be anyplace nearby that does compounding, but I would imagine he can get me some gel caps.

Gatsby was a little bit woozy last night after taking the amitriptyline. I know from taking the stuff myself some years ago that it makes you feel a little funky at first, so I'm watching him closely for side effects. Right now he's relaxing in a sunbeam--something that's been rare lately, as we've had day after day of cold rain.