Common side effects of Finacea Gel include application site reactions (burning, stinging, tingling, dryness, tightness, scaling, itching, redness, irritation), dizziness, headache, diarrhea, nausea, stomach pain, loss of appetite, constipation, changes in taste, furry tongue, and dry mouth.
Candida Overgrowth. Yes, sometimes people with Candida overgrowth experience a strong metallic bitter taste as a result of the toxins it emits. I have found that taking pantethine and molybdenum helped greatly with undesirable tastes in the mouth caused by candida. Hormone Imbalance.
Molecular biologists began to learn which cells in our mouths detect bitter and sweet tastes about 15 years ago; in the past few years, they've proposed receptor cells on the tongue dedicated to calcium, water, carbonation, soapiness, electric, alkaline, and metallic, among others.