They are essentially identical, both waxy slow-release morphine tablets. I have injected MANY (far far too many) mscontin and other generic morphine sustained-release tablets in the past, and its been over 3 years since ive banged them, and my biggest IV related scar is from banging them, and the scar is STILL there on my forearm and doesnt appear to be going anywhere. And, the only (two times) i have EVER gotten "cotton-fever" was from IVing mscontin and its generic equivolents (cotton fever often isnt from the cotton, it usually is an immune system reaction from the wax and particulates, as your body can percieve these particulae as bacteria or some unwanted microbes, and it reacts violently with fever, fine tremer, PIERCING headache/tinitus, vomiting etc.). I am luckly i didnt get endocarditis.
Anyways, if you are going to inject them, you should do it correctly (its hypocritical for me to say NOT to bang them, but this is harm reduction and people should learn from my mistakes). If you search, i have detailed a couple methods in a number of threads about injecting these types of pills specifically. You sound like you are using a decent message, and 5cc syringe is definately required for adequate filtering. So crush up your tablets after washing off the coating, then cook with your sterile water briefly while stirring (it should NEVER boil, you are not trying to kill bacteria here) untill it achieves a more uniform consistency. Unforunately, some heat is a necessary evil, as it yeilds more drug in the shot, but at the same time, it also allows more particulates to become temporarily liquified and suspended in the solution. Before cooking up the solution, get your 5cc rig ready, so removed the plunger, and put DRY sterile cotton lightly packed up to around 1cc mark, or a more time consuming way is to use stacked coffee filter paper , by cutting little circles the SLIGHTLY smaller than the diameter of the syringes barrel and enough of these (it takes quite abit of these paper circles) up to around the .5cc mark (you can use the coffee filters up to .5cc mark then add loosely packed cotton ontop up to the 1cc mark for optimal filtration). Then once you have your morphine tablet solution consistent and still warm, add just enough cotton to soak up the solution. Add this wet morphine soaked cotton into the BACK (the plunger is still out) of the pre-prepared 5cc rig for filtration (again, stuffed with either dry cotton, stacked coffee filters or both), and there will probably be remaining gunk on the spoon, and wipe up the rest with more cotton (using some sterilized tool, i use a metal pointed dental pick and tweezers, but if you are using you fingers, make sure they are pre-cleaned with anti-bacterial soap and alcohol), and add it into the back of the 5cc rig with the other wet cotton. Then, get a fresh sterilized spoon, put the neede of the 5cc rig above the spoon, and insert the plunger, and press down, forcing the wet cottons through the dry cotton/and or coffee filters into the spoon. The resulting solution should be free of floating particulates and transparent, but it will not be clear like water. Take your syringe that is going to be used for injecting and draw up this solution (if it has no floating particulates, which it shouldnt) into the injecting rig. If you are using a 2 or 5cc rig to IV with, it is better than a 1cc rig (especially if your banging numerous tablets), so the IV rig wont be full. Remove the plunger from the filtrating syringe and add more sterile water, mix it around with the tool, and put the plunger back in and slowly force more solution into the clean spoon, and draw it up with injecting rig. Keep on adding more water and forcing it through the filtering rig untill your injecting rig is full, but of course leave sufficient room for pulling back. The bigger the capacity of the injecting syringe, the more water you can pass through the injecting rig, and the higher yeild you will obtain. This is a "safer" method to filter mcontin for IV usage without micron filtration.