IV'ing morphine is A LOT stronger then oral morphine, don't really think that hydrocodone is going to kill your tolerance to morphine.. IMHO I'd rather shoot up morphine then oxycodone. Also these drugs have a different molecular structure, and the way these two drugs work on you is quite a different feeling, in my opinion anyway. So it may be the same for you..
Now everyone here may have a different opinion (as I'm sure they will) but hell 30mgs of morphine is still 30mgs of morphine, and if you take it orally it's not going to work for shit.. unless you have a low morphine tolerance.. No point in waisting 30mgs of morphine.. That's just plain out drug abuse.. -pun intended-
Now me personally I'd much more prefer to shoot up about 10mgs + of fentanyl. Which everyone is afraid of, but I think is the best drug around!! but that's just me and believe me, I do not recommend this for everyone (anyone really) not even my self.. Word of warning, do no go out and just do fentanyl. I have been experimenting for years and have build a tolerance to it, that allows me to do this much.. not something to just decide one day. "hey I can do 120 mg's of oxy's. I'm sure I can handle 10 mgs of fentanyl" cause that's a sure way of thinking of getting in a pine box for a dirt nap..
I was shooting up around100mgs + a day of Oxy's and morphine a day (combined... not 100 of oxy and 100 of morhpine).. but even eating 2.5 mgs of fentanyl would still fuck me up like the first time I ever took a pain pill of higher dosage.. and then it took me a year to get where the 5 mg patch (eating it) would not make me feel like I was about to drift off to never-never land to meet peter-pan (not about to die.. just out there).. This is not even a drug for experts, to jump into, Respect this shit if you are thinking of ever trying it.. sorry bout spelling but it's late. and I'm heading to bed.
Later,
The Opioid Receptor