Now of course the lowest-harm means of consuming the medication is PO, maybe with chewing it, which I am sure we all know, but I offer the following:
Do not wipe off the coating -- suck it off and then sterilise the pill with ethyl alcohol or running a lighter flame over it. Depending on the brand, 3 to 11 per cent of the listed morphine dose is in that coating.
Mallinckrodt (the M in the square) is the best brand of this to have for more or less anything, Mundipharma (MST Continus) and Lannacher (Vendal) also are good, be slow and careful with others and you can probably get good results (for example, I got good results with Rhodes tablets but the first few times was very careful to see if I needed to modify or repeat any steps) and Watson even is trouble for patients who swallow it.. If you are not going to inject the morphine or use it for chemical processes, one would do a lot better to simply chew the tablets and wash them down with Coca-Cola, Sprite &c. There is another waxy tablet, Codidol, Didor Continus, and so forth, which should always be taken this way to get enhanced immediate release whilst retaining some of the extended release, and dihydrocodeine should not be injected.
There are processes for Substitol, Avinza, and Kadian capsules which are different from what is described here. Coffee grinders, mortars & pestles, Everclear, isopropyl alcohol, all sorts of things.
I have seen the other processes mentioned here on Bluelight and elsewhere work, and I experiment with all of this kind of thing in the name of both harm reduction and for a kind of subversive bean spilling to retaliate for what the gangsters behind the fake phoney baloney gravy train opioid cri$i$ are doing, especially in this case with manufacturers rolling over when activist shitheads intimidated them both in the 1990s and recently. This is what I do:
In any case, a second blast of heat from a minute in the microwave of this now white pill and/or a second session of running a flame over the tablet (held with a tweezers -- one can even stick multiple ones together so as to require a single lighter session by putting moist pills together on preferably a pyrex dish before heating in the microwave; the other important part of this part of the process is to dry the pills, and if they scorch, all the better . . . This will start to break down the carnauba wax . . . then smash the tablets in a mortar & pestle or via other methods you have discovered. The powder should have a pinkish cast to it, and if the pills were blackened on the outside, say by letting them flame up for a split second, you also have some helpful activated charcoal of sorts in there to help you. The salt from 9‰ (isotonic) sterile saline, or 4.5 or 18 or 50‰ sterile saline, or a pinch of salt will also help with the separation which is going to happen when you mix this.
Maybe it works without heating (nearly all brands of extended-release oxycodone were a disaster and practically none of this worked when I tried it, and oxymorphone tablets require a different process) but I heat it enough for a waxy scum to form on the surface, then use a sterile instrument, or even a bit of convection from heating, to push it to one side and get an open area. You can reprocess this waxy material to extract more morphine and/or swallow it -- do not throw it away. There is bound to be some morphine left in it, and it will last 8 to 15 hours when swallowed.
Then use a dropper or syringe to suck out this liquid and put it in a test tube, another spoon or whatever. If the waxy material doesn't consolidate quite so obviously and cleanly, something I do is is get a mesh hemisphere from a small tea strainer which broke years ago, put it on top of a shot glass and pour through the mesh. This mesh strainer also fits well on a jigger on either half, but if heating the liquid, and pouring immediately after, which is what I recommend, the metal will get hot and could lead to a spill if one is surprised by thing when handing the jigger full of morphine solution; the shot glass I use is also made of pyrex, which may not be absolutely necessary, but I can use it in the microwave for the step of the process mentioned above. All of the pouring and really the whole process should be done over a plate or something similar which will be a sterilisable work surface which will allow 100 per cent recovery in the event of a spill.
I use a metal 15 ml spoon with an improvised wooden handle, or the Oxo metal spoons and measuring cups (with the long, rubber-insulated handles) to do the heating and use either a Bunsen burner or the bottom of a soda can cut off, then this piece is turned upside down to get a concave area in which to pour a little 70 to 100 per cent ethanol -- isopropyl alcohol does work but makes for a hotter and more aggressive flame and coats the spoons and anything else put in or over the flame with a thick layer of soot very rapidly. I light it with a fireplace lighter and get up to three minutes of a nice blue flame. I sometimes will use the flame to do the crisping step above but prefer a fireplace or cigarette lighter. There are fireplace lighters which dispense the butane with just enough force to have a blowtorch effect which makes it possible to direct the flame better.
Then this liquid needs to be filtered as well as possible. Using very fine wheel filters and inline IV filters I have been able to use the three major routes of injection, though mostly when I have done this it has been for research purposes on the method above and alternatives, filters, the various manufacturers' tablets, and so forth, and then continue on to get morphine base, sulphate, and hydrochloride from the liquid in a powder form and then have it go to AA to get stronger and clear its mind or other such things. My largest batch was 240 of the 100 mg Mallickrodt morphine extended release tablets which produced a lot of very concentrated reddish-purple (this has to do with the oxidation of inert ingredients that gives pink powder -- these tablets have a grey coating) morphine sulphate solution which I put to various uses.
I always liked the morphine pins & needles feeling though I like the feeling of morphine mixed with tripelennamine and orphenadrine even better, both of these are antihistamines and will reduce the pins & needles effect. Mix them together rather than taking sequentially because those ingredients really enhance the bang to a great extent.