Replacement therapy for vitamin B12 deficiency: comparison between the sublingual and oral route
Article first published online: 14 NOV 2003
British Journal of Clinical Pharmacology
Volume 56, Issue 6, pages 635–638, December 2003
How to Cite
Sharabi, A., Cohen, E., Sulkes, J. and Garty, M. (2003), Replacement therapy for vitamin B12 deficiency: comparison between the sublingual and oral route. British Journal of Clinical Pharmacology, 56: 635–638. doi: 10.1046/j.1365-2125.2003.01907.x
- Issue published online: 14 NOV 2003
- Article first published online: 14 NOV 2003
- Received 3 February 2003, accepted 28 April 2003.
- cobalamin deficiency;
Aims To compare the efficacy of sublingual and oral administration of 500 µg of cobalamin in subjects with cobalamin deficiency.
Materials and results Thirty subjects with low serum concentrations of cobalamin participated in the study. Subjects were randomly allocated to receive one tablet daily of 500 µg cobalamin sublingually or orally, or two tablets daily of a vitamin B complex. Serum cobalamin concentrations before treatment were 94 ± 30 pmol l−1, 108 ± 17 pmol l−1 and 98 ± 14 pmol l−1 in the sublingual B12, oral B12 and oral B-complex groups, respectively. After 4 weeks, concentrations rose to 288 ± 74 pmol l−1, 286 ± 87 pmol l−1 and 293 ± 78 pmol l−1, respectively. The increase in each group across time was statistically significant (P = 0.0001, differences [95% confidence intervals] 194.2 (114.5, 273.9), 178.3 (104.2, 252.4), and 195.1 (135.0, 255.2) pmol l−1, respectively). There was no significant difference in concentrations between the treatment groups.
Conclusion A dose of 500 µg of cobalamin given either sublingually or orally is effective in correcting cobalamin deficiency.