It is true that B6, particularly if it isn't taken with enough of the other B's, can cause these types of neurological symptoms. But the recommendation to limit the dose to 100 mg per day seems excessively cautious to me. If you take a look at the cases where this has happened, some elderly people took 600 mg a day for well over a year before symptoms started and didn't stop taking it when the symptoms started. There were some other cases also with higher doses, up in the grams, and maybe some with a little lower doses. But no one got these symptoms taking 600 mg orally for a month or two, which a person could do as a test to see if it would help them. Unfortunately, when they report on these cases, they never say what, or how much of the other B vitamins the person was taking.
We are using 600 mg a day of the P5P form, which has 400 mg of B6 in it, and we use high doses of all the other B vitamins along with it. The orthomolecular doctors have given doses as high as 3 grams a day (of regular B6) without problems, but they always give high doses of the other B's with it.
My son with schizophrenia HAS to have larger doses of B6 than 100 mg. If he does, he can be off medication and be pretty much symptom free, (he takes a lot of the other B's, too, he needs a lot of niacin and folate). This is really important because the medication has bad side effects and doesn't take away all of his symptoms. I mistakenly thought that he didn't need as much B6 last spring and I told him to take less and he had a terrible relapse that started a few weeks after he lowered his dose of P5P to 100 mg a day, even though he didn't change the other supplements.
We are using 600 mg a day of the P5P form, which has 400 mg of B6 in it, and we use high doses of all the other B vitamins along with it. The orthomolecular doctors have given doses as high as 3 grams a day (of regular B6) without problems, but they always give high doses of the other B's with it.
My son with schizophrenia HAS to have larger doses of B6 than 100 mg. If he does, he can be off medication and be pretty much symptom free, (he takes a lot of the other B's, too, he needs a lot of niacin and folate). This is really important because the medication has bad side effects and doesn't take away all of his symptoms. I mistakenly thought that he didn't need as much B6 last spring and I told him to take less and he had a terrible relapse that started a few weeks after he lowered his dose of P5P to 100 mg a day, even though he didn't change the other supplements.