If you are currently being treated with any of the following medications, you should not use cat's claw without first talking to your healthcare provider.

Immunosuppressive Medications
In theory, because cat's claw may stimulate the immune system, this herb should not be used with medications intended to suppress the immune system, such as cyclosporin or other medications prescribed following an organ transplant. This theory has not been tested scientifically.

NSAIDs
Cat's claw may protect against gastrointestinal damage associated with nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen.