You should just mix your own and save yourself some money. There are options for this such as PUFF MAJIC or EJ Mix. It is super easy. I generally mix 1g bho to 3ml of PUFF MAJIC. Great product, great taste, gets me lifted as a mofo and really helps with my pain management. Takes literally 5 minutes to make. You can adjust your ratio for desired strength if you are using concentrates that are tested and you know the THC levels. You just never know exactly what you are getting with the pre made cartridges. I vape my meds almost exclusively now that I mix my own. I just grew tired of the variations in quality with using the mystery cartridges for pain management. Think about it. When you go to Walgreens you never have an issue with a bunk batch of pain killers. They are always the same. I guess if you are just getting high it isn't such an issue but I still recommend looking into making your own.