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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]
[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]
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.
They are given by injection. [2] Common side effects may include joint pain, rash, vomiting, and headache. [4] Serious side effects may include heart attacks, stroke, increased cancer growth, or pure red cell aplasia. [2] It is unclear if use is safe during pregnancy. [5] [6] They work similar to naturally occurring erythropoietin. [1]
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.
Some antimetabolites can also be antibiotics, such as sulfanilamide drugs, which inhibit dihydrofolate synthesis in bacteria by competing with para-aminobenzoic acid (PABA). [9] PABA is needed in enzymatic reactions that produce folic acid, which acts as a coenzyme in the synthesis of purines and pyrimidines, the building-blocks of DNA.
It resembles a component of folic acid. It prevents folic acid synthesis in the bacteria that must synthesize their own folic acid. Mammalian cells, and some bacteria, do not synthesize but require preformed folic acid (vitamin B9); they are therefore insensitive to sulfamethoxazole. [2] It was introduced to the United States in 1961. [3]
For many biologics (e.g., monoclonal antibodies), injection site reactions are the most common adverse effect of the drug, and have been reported to have an incidence rate of 0.5–40%. [2] In trials of subcutaneous administration of oligonucleotides, between 22 and 100% of subjects developed reactions depending on the oligonucleotide. [6]