They are codeine phosphate capsules so I suppose thats just pure codeine mainly because it doesnt mention some other stuff. There are actually persons (like me) who will get minimal to no outcome from codeine (it is a spectrum in lieu of a clear delineation of slow/usual/immediate metabolism). I guess https://dihydrocodeine30mg81849.pages10.com/5-easy-facts-about-can-i-buy-co-codamol-at-chemist-described-71741106