Just in the last year, I've had one acquaintance die of a chiropractor-induced stroke and another go blind in an eye. Both of them were at high-dollar places that aren't the normal low life quacks.
Just don't do it.
Even if it works, they're just dealers who keep you coming back after you get that first hit, and using their services makes you continually need them.
Learn to stretch a lot and lift heavy weights. Get more muscle, more flexibility, and less fat, and most of those problems go away.