"The Food and Drug Administration (FDA) has announced that, in response to a trend in which caffeine is being added to a growing number of products, the agency will investigate the safety of caffeine in food products, particularly its effects on c"...
Folacin (folic acid) when administered as a single agent in doses above 0.1mg daily may obscure pernicious anemia in that hematologic remission can occur while neurological manifestations remain progressive. The 2 mgs of cyanocobalamin contained in FOLTX (folacin, cyanocobalamin & pyridoxine) has been shown to provide an adequate amount of cyanocobalamin to address this precaution5. Unmetabolized folic acid has been shown in one study of 105 postmenopausal women (50-75yrs) to have the potential to reduce natural killer cells' cytotoxicity, which may result in an impaired immune response6.
Cyanocobalamin should not be used in those with Leber's optic atrophy. Decreased levels of B12 have been associated with reduced ability to detoxify the cyanide in exposed individuals and cyanocobalamin may increase the risk of irreversible neurological damage from optic atrophy in those affected with the disorder.
Hydroxocobalamin can aid in the detoxification of cyanide. This form of B12 is an acceptable form for B12 supplementation in those with this disorder.
5 Kuzminski AM, Del Giacco EJ, Allen RH, et al: Effective Treatment of Cobalamin Deficiency with Oral Cobalamin. Blood 1998; 92:1191-1198.
6 Troen AM, Mitchell B, Sorensen B, Wener MH, Johnston A, Wood B, Selhub J, McTierman A, Yasui Y, Oral E, Potter JD, and Ulich CM: Unmetabolized Folic Acid in Plasma is Associated with Reduced Natural Killer Cell Cytoxicity among Postmenopausal Women. Journal of Nutrition 2006 Jan; 136(1): 189-194.
Last reviewed on RxList: 6/30/2008
This monograph has been modified to include the generic and brand name in many instances.
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