I don't know how much of everything is in Panlor DC (couldn't find that on the net) but there is caffeine, dihydrocodone, and acetaminophen in these pills. Acetaminophen is a mild pain reliever used to intensify the dihydrocodone. I have taken two of these at once already and felt very mild effects. I think it would be safe to do four, but I was wondering if anyone else had tried this. I found very little information on erowid experience vaults. Thanks for the help. I don't know how much of everything is in Panlor DC (couldn't find that on the net) but there is caffeine, dihydrocodone, and acetaminophen in these pills. Acetaminophen is a mild pain reliever used to intensify the dihydrocodone. I have taken two of these at once already and felt very mild effects. I think it would be safe to do four, but I was wondering if anyone else had tried this. I found very little information on erowid experience vaults. Thanks for the help. Edit: By safe I mean is it going to kill injur/immediately. I am not worried about addiciton because I have a limited supply. Disregard addiction. I'm worried more about overdosing, but I heard that it is just tylenol with codiene and caffeine. In which case I think i'll be fine...