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.
Here is a list of the foods to avoid on the candida diet: 1  Sweets: Barley, corn or rice syrup; sugar; honey; maple syrup; dairy products (they contain lactose); any foods containing concentrated sweeteners.  Foods that easily convert into simple sugars: Melons, dried fruits, fruit juices, refined flours and white rice.