I heard from a friend who gets bad migraines that you do not need to take a full dose, causing psychedelic effects, in order to get the relief/prevention. She said that a half dose prevented migraines for about two weeks. I do not know if the same strategy would work for cluster headaches, or even if it's a universally applicable characteristic of the drug, but if your mother is not the adventurous type or is unsure about tripping, she may want to try a smaller amount first to see if she can get the prevention without the mind-altering effects. Good luck in any case.
conradfr|12 years ago
filoeleven|12 years ago