I have been on this stuff for about two weeks and have been mixing it with cypionate. That was no problem. The cypionate ran out so I used the very last cc of B-12, no problem with that. Couldn't find my other bottle of B-12 and am waiting for some other gear to mix with it so I took one cc by itself. My right glute woke me up last night in pain. I have never felt anything like that from an injection before. I even warmed up the dart with the gear in it with air in hopes to expel some of the alcohol. Didn't work. I have been reading the posts and I have some of the original lot numbers so I was aware of the contents, just took me by suprise. Primo and Deca should be here before my next shot so I should be fine. Wow, that hurt. Off to do cardio, my ass will scream in pain from that as well.

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