For me, much more than a teaspoon of the dry powder will cause some exciting nausea. :barf:
But, as Steven said, everyone is different. Cramp bark can also be used in the same way without the puking. 🙂
Review the Pain Management with Herbs module. There are some good ideas there. Antispasmodics (like crampbark or Lobelia) and nervines will likely be your best bet on a disk issue.
Acupuncture can also be really effective for disc cases. I’ve recently been adding acupuncture to my management of dachshunds that blow disks in their back and have been impressed with the difference.
Doc
Don't use herbs or combine herbs with medications or use them during lactation or pregnancy without talking with your healthcare provider.