If I ingest them then I would be afraid that they would eat what they find in my digestive track multiplying in my intestine until they burst out of my stomach to a scene that only Sigourney Weaver could handle.
Rox species is not supposed to drink at all. This is why you never see him go to the restroom. Because the fluids in his body are regulated by an organ known as the Kasling, which performs all the same functions of the human bladder, kidneys, and subcutaneous glands. This organ is directly tied into the logic and reasoning centers of the brain.
In short, if Rox drinks so much as a sip of water, the imbalance in his system would cause an intoxication effect.