Zinc for cold?
Some studies suggest that zinc lozenges or syrup (but not zinc dietary supplements in pill form) help speed recovery from the common cold if taken within 24 hours of the beginning of symptoms. However, more study is needed.
Zinc interacts with common medications. Taking a zinc dietary supplement along with antibiotics ( Cipro®, Achromycin®) reduces the amount of both zinc and the antibiotic that the body absorbs. This interaction can be avoided by taking the antibiotic 2 -3 hours before or 4–6 hours after taking a zinc dietary supplement. People who take common antihypertensive medications chlorthalidone (brand name Hygroton®) and hydrochlorothiazide for a long time may suffer from zink deficiency
Too much Zinc can cause nausea, vomiting, stomach cramps, diarrhea, and headaches. Zink can not be taken for a long time, due to potential with decreased immunity and lowering level of HDL ( good cholesterol)
Read more about the recommended doses at the office of dietary supplements website
*Always tell your primary care physician about ALL supplements you take