[chidg]

With regard to 2CB and 2CE - This might be somewhat true in some local markets, but it seems very unlikely to be widespread, at least with experienced drug users, because the dose of LSD vs the 2Cs (except for the brominated ampetamine 2C derivatives) are very different. The dose of LSD is usually around 100 micrograms while a dose of 2CB is somewhere around 10-30 milligrams - so around 100 times as much. The amount of LSD in a dose is so small that it can fit on a blotter paper. This is not the case with most other drugs. There are some 2C derivatives which have very low doses and can be put on to blotter, but they tend to have much longer durations of action than LSD so would also be discernable by an experienced user (or even a new user who had done some reading before hand).

There are other increasingly common substances like NBOMe which are substitutable for LSD in potency and are also very dangerous. These have been reported sold as LSD on blotting paper and also show up in 'ecstacy' pills.

Going back to the original topic, it does seem unlikely the drug in question was LSD. It is more common for people to experience violent psychosis on drugs like PCP or potentially some ampthetamines. I hope the guy recovers.