Anyone else in this boat, as soon as you feel tingling or numbness in your hands or feet, STOP TAKING THE FLAGYL AND CALL YOUR DOCTOR. There are other options for antibiotic treatment and if these symptoms are left unchecked even for a couple days it can have long lasting nerve damage. Nausea, exhaustion, dizziness, acid reflux, etc are normal, Flagyl is an absolute beast to take, but mental confusion, blurred vision, tingling or numbness or burning, all are much more serious.