It should be at least as effective as the pills! Frequently powders or herbs will be slightly more effective as they are not in pill form, sitting around on some shelf until they sell. Check your local health food store for different herbs as well!
Something you can check into- if buying the powders works out for you - is to 'stuff' your own capsules. That's what I do. I buy just the powdered herbs, then I buy the gelatin capsules (they have vegetarian capsules that can be purchased as well) and fill them myself. Because I have so many different herbs/herbal mixes that I take, I invested a little bit of money into a capsule filler - here is one link to a good price on one like I use:
www.amazon.com/Cap-M-Quik-Capsule-Filler-Machine-Size/dp/B003THWR8Y/ref=sr_1_2?ie=UTF8&qid=1354550791&sr=8-2&keywords=Size+0+cap-m-quik+capsule+filler I use size "0" capsules, they hold 500 mgs of powdered herbs each, and are of a size that I can swallow them fairly easy even when I'm having a bit of problem swallowing pills that day.
You can buy a 'tamper' or you can do as I do and find a writing pen that is just the right size to fit down in there to pack the powder down a bit to be sure you get enough in each capsule.
Shop around though, there are sales on these things, and sometimes really good sales on the 'starter kits', which will include the capsule holder, empty capsules, and sometimes a tamper.
I wish you luck in your healing journey!! There are quite a few people that have had some good results using Buhner's herbs! Just in case you didn't know, he also has a website of his own where you can read about
his protocols, others that are using his protocol and he even answers some questions too!
buhnerhealinglyme.com/