A little Googleing will show that Methylene Blue, a coal tar dye, was first synthesized in 1875, and was used by the famous French scientist, Ehrlich, in 1861, to treat pain and neuropathy because he noticed it had an affinity for neural fibers. A typical dose is 100 mg per 100Kg of body weight as a pill, or 1 to 2 mg per 100Kg as an injection.So the bottom line is this:
Bulk price for MB is $42/Kg but pharm grade is now going for $285 for 250mg!! The greed has begun.
A patent was filed in 2004 for a "new" way of making the compound because MB is too old to patent itself, and hence wouldn't be profitable enough. It appears that the prescription price will be about $5/day.
This is one "drug" that the US government should nationalize in order to HELP the elderly, most of whom are on limited incomes, and to prevent their exploitation by the pharmaceuticals for unearned profit.
Methylene Blue has been known for 127 years to be good for neurological problems, and is cheap.
Drug companies seem to have realised this and are rushing to shore up profits by applying for new patents on an old remedy.
The price has spiked, probably due to a sudden interest. I bet that as soon as things settle down generic drug producers will be producing this stuff like it is going out of fashion.