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In January whiter 1997, 62 subjects who had been the placebos in the 1995 study were invited to receive the vitamin B12. In June 1997, the 62 placebo subjects were sent a questionnaire asking: How would you compare your overall allergy (hay fever) symptoms this spring to the last two springs? 20 people responded, with 15 reporting having had the B12 treatment, and 5 not. 12 of the 15 reported at least a slight improvement in overall allergy symptoms, and 1 of the 5. Improvement ratios - 12:3 having received treatment, tooth 1:4 not having received treatment.8 A bioequivalence study showed that a 3000 mcg lozenge delivered an equivalent amount of cyanocobalamin to the blood as a 15 mcg injection.9 From the spring to the summer patients with demonstrated allergic rhinitis received with the cyanocobalamin (or placebo) containing lozenge twice daily for 21 consecutive days. All subjects also received C and B oral multivitamins for 21 days. Twice daily subjects maintained a nine-week diary on sneezing, runny nose, nasal congestion, itchy eyes, itchy nose and antihistamine (chlorpheniramine) use. In the post-treatment period, the active group (n=15) recorded on average a greater reduction in symptoms and in antihistamine use than the placebo group (n=9). The results yielded reductions (0.1>p>0.01) in total weekly symptom/rescue medication for the active group compared to the placebo for weeks 2, 6, 8 and 9. The results tend to replicate those of the studies on injectable cyanocobalamin.10

Antihistamines As the name indicates, an antihistamine whiter counters the effects tooth of histamine, which is released by the mast cells in the body''s tissues and contributes whiter to allergy symptoms. For many years, antihistamines have proven useful in relieving sneezing and itching in the nose, throat, and eyes and in reducing nasal swelling tooth and drainage. Many people who take antihistamines whiter experience some distressing side effects: drowsiness and loss of alertness and coordination. In children, such reactions can be misinterpreted as behavior tooth problems. During the last few years, however, antihistamines that cause fewer of these side effects have become available by prescription. These new nonsedating antihistamines are as effective as other antihistamines in preventing histamine-induced symptoms, but do so without causing sleepiness.

In 1990 study in San Diego, CA the 5 active subjects with allergic rhinitis had a lowered total serum IgE from Day 0 to Day 90 while 4 placebo subjects, (2 with allergic rhinitis, 1 with asthma and 1 with both), had flat or increased IgE levels.4 In a randomized, double-blind, placebo controlled study of symptoms and serum IgE levels in San Diego, CA in mid-1991, subjects had allergic rhinitis and/or asthma. Serum was drawn at Day 0 and Day 30. Seven of the 10 active treated subjects had a reduction whiter in total serum IgE levels. In 10 placebo treated subjects, 5 had levels of total serum IgE that stayed the same (plus or minus 5%), 3 decreased and 2 increased.5 Statistical analysis of the open-label study as well as the tooth double-blind randomized placebo controlled study have shown a significant effect of vitamin B12 in lowering serum IgE concentrations.