If anyone’s seen ‘Czech Heroin Holiday’ by Vice on YouTube the users on there inject it and only use shitty cotton as a filter which I imagine is extremely dangerous!
They also think that heating it in vinegar (5% acetic acid) will acetylate the morphine into Heroin, which it obviously doesn’t.
There are injectable pharmaceutical forms of opium but all they are is all the opiates from opium extracted and in the exact ratio that they are in opium but obviously sterile for injection.
Pantopon by Hoffman La-Roche which came out in 1909 and is also known as Opium Alkaloids Hydrochlorides is basically injectable opium.
Omnopon is similar but just codeine, morphine and papaverine in the same ratios as opium.
These preparations are apparently less likely to cause allergy than just morphine.
If you were to get some micron-filters you could inject it, as that would remove all the fats, proteins in the opium and anything else potentially there like bacteria and fungi from when you harvest it but it’d let the alkaloids through though.