Usually taken orally but can be inject via three routes. Unknown if hydrocodone can be sniffed or smoked. Sniffing is likely possible. 1mg - 2mg Nonmedical same as pain relief doses Routes Of Administration Can be administered orally, by three routes of injection, and by sniffing. Unknown if smoking is an effective route.
Hydromorphone depresses respiration minimally.
Hydromorphone effects GI tract very little. Hydromorphone is one of the most used opioids in the relief of pain for the terminally ill. Medical pain relief is achieved with approx. Same as morphine but milder. Oral use provides little euphoria and tends to block opioid receptors in brain, so commonly used as a maintenance drug during rehab.