I was on foculin for a while and just snorted and ate it. Then my doctor pulled me off the script with no warning, so i switched to IV meth. Through my own research i've found there is no practical way to sterilize that solution for iv use, and for dexmethylphenidate, it depends on if it will decompose after 30+ min vigerous boiling, which is how long it takes to sterilize a solution. Sterility is a yes or no value. Either something is sterile, or it isnt. Disinfection is significantly reducing bioburdern, Sanitization is reducing the bioburden. These are legally protected terms. An exception is so called Sterilising filters, because they do not sterilize. They filter out organisms > .22 microns but this does not include a genera of bacteria called mycoplasms and ALL viruses, which are very very very small.
Let me say this: there is no way to guarentee sterility for a shot for the average consumer. Even if you had a sterile solution, without training in ascetic technique you will contaminate it during preperation and administration.
best option for most people: industrial grade PES .22 micron filters off of amazon. Pyrogen free + surfactant free is best.
Other tips for reducing bioburden - boil water 30 min, or at the very least 5 for disinfection or use sterile water. I cant get sterile water in louisiana in the US, it requires a perscription.
WASH YOUR HANDS. WASH/ALCOHOL THE INJECTION SITE.
use sterile cotton balls for the filter and sterile cookers, if you can get them, i cant, i boil a clean spoon with my water.
But while pathogens are a major concern with iv/im/subq use, pill fillers are even worse. Your body has a whole system designed to deal with pathogens. It has no way to deal with inorganic pill fillers. Not even a .22 micron filter will remove talc and certain other constituents, which travels into your capilliries and block them, and its gonna stay there forever. Or stay just under the skin as a home and safehaven for pathogens and reoccurant infection. It seriously is never worth it to crush and inject pills. If you are going to do it regardless, a cotton filter is next to useless. order a 5 mm pore size filter and then the smallest pore size u can find, .11 i think is the smallest ive seen. First pass you push ur solution through the 5 mm for the large gunk. Second pass into the small pore. If its too difficult to push through with either of these, you can try a coffee filter to prefilter or use multiple filters if it clogs. If you do that, the talc will probably still be in it and so will viruses and unusually small microplasms maybe, but it will be the cleanest you can expect to get it. You can use any size needle u can get but IM injections are usually performed with a 20-25 gauge needle. They do not make insulin needles this big. Pick a suitable site for IM injection. Common sites include specific areas of the shoulder, hip, buttocks and thigh. I could try and explain it, but best if you google "ideal IM sites" so you can see the pictures. Once youve selected a site, wipe it with antiseptic like alcohol/hydrogen peroxide, ect, then you go straight in, like a controlled stab, perpindicular to the site. Then inject slowly, pull out, cover with sterile gauze or cotton and band aid.
Let me reiterate, this is not a good idea. Please don't do this. When you inject subq or IM, what happens is the drug gets taken into the capillaries and into systemic circulation. The effect is a slow onset effect just like taking it orally, without the safety filters. Not every drug/substance gets absorbed this way, some will not cross into systemic and start damaging the muscle and soft tissue. Idk the specifics of dexmethylphenidate, but extrication and intrication of IV drugs (basically, a "missed shot") is a very real risk for nurses administering IV formulations that can cause necrosis and require urgent surgery. If you get an abscess from an IM injection, thats a sure sign not to do it anymore, it means there is something nonremovable/inorganic getting stuck. Drugs administered this way are specially designed to work that way, it is not a "natural" path of absorption, if that makes sense.
Im trying to be helpful without fear mongering, i just want you to know what ur dealing with. Plugging it is honestly the besr compromise. Instant/near instant diffusion into systemic that bypasses 1st pass metabolism. Dont worry about the details of the technique, just mix with water, lube entrance/canal and needle-less syringe (generously), and then shoot it up the pooper. How deep? Doesnt matter, just make sure ur in the rectum, about an inch+ in, the anal canal is a transitional epithelial layer which will not absorb as well. How much water? Doesnt really matter, but Probably no more than 3 ml, or it switches from plugging to giving yourself an enema. I use 1 ml, but a pill might take more.