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Disease-causing deficiencies of vitamin B6 are quite rare-and they are usually a side effect of medication.
A short list of drugs can deplete the body of so much vitamin B6 that there are chapped lips, swollen and crusty eyelids, unusual daytime sleepiness, and, in the worst cases anemia and seizures. B6 depletion most commonly occurs during treatment with:
Because vitamin B6 deficiencies caused by these medications are well-known, the drugs are seldom used.
It's also possible for babies to become deficient in B6 if they are breast fed by mothers who are deficient in B6, and deficiencies also occur when there is chronic liver or kidney disease.
The advantage of an injection of vitamin B6 is that the vitamin bypasses the digestive tract and goes straight into the bloodstream. In many countries, you would only get vitamin B6 injections in the doctor's office. In the United States, however, you would probably be given a prescription for both injectable vitamin B6 and a box of syringes and told to give yourself shots at home.
Here is what everyone needs to know about painless injections:
The great thing about vitamin B6 injections is that they reliably replace depleted vitamin B6, and fast. Most people who need treatment for B6 deficiency are able to use vitamin B6 supplements by mouth after just a few days of treatment.