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[3] [4] It is given by injection into a muscle or vein, [2] by pill or sublingually. Side effects are generally few. [2] They may include diarrhea, feeling sick, hot flushes, itchiness, low blood potassium, allergic reactions, and high blood pressure. [2] Normal doses are considered safe in pregnancy. [5]
Possible side effects of cyanocobalamin injection include allergic reactions such as hives, difficult breathing; redness of the face; swelling of the arms, hands, feet, ankles or lower legs; extreme thirst; and diarrhea. Less-serious side effects may include headache, dizziness, leg pain, itching, or rash. [18]
Folinic acid, also known as leucovorin, is a medication used to decrease the toxic effects of methotrexate and pyrimethamine. [2] [3] It is also used in combination with 5-fluorouracil to treat colorectal cancer and pancreatic cancer, may be used to treat folate deficiency that results in anemia, and methanol poisoning.
Folic acid fortification is a process where synthetic folic acid is added to wheat flour or other foods with the intention of promoting public health through increasing blood folate levels in the populace. It is used as it is more stable during processing and storage.
Both high-folate diets and supplemental folic acid may help reduce the toxic side-effects of low-dose methotrexate without decreasing its effectiveness. [ 8 ] [ 9 ] Anyone taking low-dose methotrexate for the health problems listed above should consult with a physician about the need for a folic acid supplement.
[2] [4] Plants do not need cobalamin and carry out the reactions with enzymes that are not dependent on it. [5] Vitamin B 12 is the most chemically complex of all vitamins, [6] and for humans the only vitamin that must be sourced from animal-derived foods or supplements. [2] [7] Only some archaea and bacteria can synthesize vitamin B 12. [8]
One study in 184 premature infants, reported that individuals given monthly vitamin B 12 injections (100 μg) or taking supplements of vitamin B 12 and folic acid (100 μg/day), had higher haemoglobin concentrations after 10–12 weeks, compared to those only taking folic acid or those taking no vitamin B 12 injections. [87]
Folic acid is a synthetic derivative of folate and is acquired by dietary supplementation. [25] Multi-vitamin dietary supplements contain folic acid as well as other B vitamins. Non-prescription folic acid is available as a dietary supplement in some countries, and some countries require the fortification of wheat flour, corn meal or rice with ...