Hello, please what can be be cause of a persistent metallic or ironic taste in the mouth?

Need to see doctor: A persistent metallic taste can be due to a toxin (such as lead or copper) that can be checked with a blood test. In addition, some infections an cause taste abnormalities. In any case, you need to see your physician and find out the correct answer.

Multiple: Possibilities. Many different medications can cause this. Some allergy meds. Some supplements. Also upper resp infections. Reflux disease To name A few. Talk to your doctor for a work up including blood work to help find the cause