[Early response to oral cobalamin therapy in older patients with vitamin B12 deficiency].
OBJECTIVE
Standard treatment of vitamin B12 deficiency involves regular intramuscular cobalamin administration. The aim of this study was to determine whether oral cobalamin treatment may be an effective therapy for treating older patients with cobalamin deficiency related to nutritional deficiency and food-cobalamin malabsorption.


METHODS
We prospectively studied 20 patients older than 80 years with established cobalamin deficiency related to food-cobalamin malabsorption (n=14) and nutritional deficiency (n=6) who received 1000 micro g of oral cyanocobalamin per day. Levels of serum cobalamin and blood counts were determined at baseline and after the first week of treatment.


RESULTS
After an average of 8 days of treatment, 17 out of 20 patients normalized their serum cobalamin levels; the patients had increased their serum cobalamin level (mean increase of 0.23 micro g/L; p<0.01 compared with baseline), reticulocyte count (mean increase of 27400/mm(3); p<0.05), hemoglobin levels (mean increase of 0.7 g/dL; NS), and decreased the mean erythrocyte volume (mean decrease of 0.7 fL; NS).


CONCLUSIONS
Our findings suggest that cyanocobalamin given orally during one week may be an effective treatment for cobalamin deficiency related to food-cobalamin malabsorption and nutritional deficiency and may avoid painful intra-muscular injections in older patients.
Kaltenbach
Georges
G
Centre de Gérontologie, Hôpital de la Robertsau-Hôpitaux Universitaires, 83, rue Himmerich, 67000 Strasbourg. georges.kaltenbach@chru-strasbourg.fr
Noblet-Dick
Marie
M
Andrès
Emmanuel
E
Barnier-Figue
Geneviève
G
Noel
Ester
E
Vogel
Thomas
T
Perrin
Anne-Elisabeth
AE
Martin-Hunyadi
Catherine
C
Berthel
Marc
M
Kuntzmann
Francis
F
D000284:Administration, Oral; D000368:Aged; D000369:Aged, 80 and over; D004911:Erythrocyte Volume / Q000187:drug effects; D005260:Female; D006454:Hemoglobins / Q000187:drug effects; D006801:Humans; D008286:Malabsorption Syndromes / Q000097:blood / Q000150:complications*; D008297:Male; D011446:Prospective Studies; D012016:Reference Values; D017701:Reticulocyte Count; D014805:Vitamin B 12 / Q000097:blood / Q000627:therapeutic use*; D014806:Vitamin B 12 Deficiency / Q000097:blood / Q000209:etiology*
D006454:Hemoglobins; D014805:Vitamin B 12