This is pharmaceutical fentanyl. Not extracted from the patches. It will be 10mg mixed with 990mg of lactose. I guess I could make 5mg bags, you will get the best deal with 10mg.. It will be very similar to aromatics (if anyone remembers him) not associated with him what-so-ever. I will personally test each batch to make sure its up to par. I've debated a lot about even offering this. I want everyone to be safe, thats why everyone should own a milligram scale, etc. and know what you are doing. When I list it, I will give different ideas to keep safe..