What’s the age of the person?

100mg is a bit high. Even for someone with tolerance. I personally have never seen a prescription for Norco 10-325 to be taken 10 pills at a time.

But two major concerns present itself:

1. Respiratory depression induced by opioids
2. Liver damage caused by the acetaminophen in the Norco; assuming you are from the US where just getting hydrocodone by itself is not really a thing, minus special cases.