supplement question - bovine adrenals

Does anyone have experience taking bovine adrenals as a supplement? My chiropractor had me start taking them because he said my stress response was low. The label said to take 2/day, but he said 4/day; I took 4 the first day, and it sent me on a roller coaster like a crazy caffeine high followed by a crash. Since then, I've been taking just 1/day for about four weeks. I'm not really seeing any measurable effects.

Does anybody know anything about this product?

[BTW - I stopped going to that chiropractor because he was more interested in hawking expensive pills and stuff than in caring for the patient. I'm still taking the pills because they cost a fortune and I'm not going to waste them.]