What causes a metallic taste in my mouth and what can I do about it?

The metallic taste in your mouth could be due to a dry mouth, a change in the saliva, or your taste buds becoming more sensitive. Common reasons why these changes in saliva or taste bud sensitivity happen are:
•    Side effects of medicine. There are about 400 different drugs that can affect taste sensation.
•    Dehydration. You might not even be aware that you are not drinking enough water. 
Other causes include a sinus infection, acid reflux, or advanced kidney or liver disease. 
First, try drinking more water than your normally do. If you are taking any medicines or supplements, ask your pharmacist if one of them may be the cause. If the problem persists, arrange a visit with your doctor.