pain
"Hydromorphone is the strongest pain killer, and it works wonders, BUT, there is one problem. When taking orally, only anywhere from 15% to 35% of the drug is absorbed depending on the person  --that's why some people give it bad reviews saying it doesn't work, as they likely only absorbed 15% -- others may absorb 35%, or more than twice the strength, which is a massive difference, it all depends on how your body breaks it downs.

This drug is for serious pain. IV makes it absorb majority of the drug, making it CRAZY strong, the strongest IV pain med there is."