Recovery from common cold can now be much faster, by taking zinc lozenges not exceeding 100 mg of elemental zinc per day, reveals a new research. Analysing three randomised controlled trials, the researchers found that zinc acetate lozenges may increase the rate of recovery from common cold three fold.
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On the fifth day, 70 percent of the zinc lozenge patients had recovered compared with 27 percent of the placebo patients, showed the study published in the Journal Open Forum Infectious Disease. "Given the evidence of efficacy, common cold patients may be instructed to try zinc acetate lozenges within 24 hours of onset of symptoms," the study said.
The dose of zinc in the three studies was between 80 to 92 mg/day.
Such doses are substantially higher than the recommended daily zinc intake in the US, which is 11 mg/day for men and 8 mg/day for women.
However, in certain other controlled studies, unrelated to the common cold, zinc has been administered in doses of 100 to 150 mg/day to patients for months with few adverse effects.
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None of the three analysed zinc lozenge studies observed serious adverse effects of zinc.
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The researchers, however, noted that the optimal formulation of zinc lozenges and the best frequency of their administration should be further investigated.
"The three-fold increase in the rate of recovery from the common cold is a clinically important effect. The optimal formulation of zinc lozenges and an ideal frequency of their administration should be examined," the researchers said.
--IANS
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Source-IANS