Hi & Welcome to HCM. I appreciated your concerns for your beloved mother who is suffering from diabetes Alzheimer s disease and some sort of infection for which she is prescribed the antibiotic Ciprofloxacin. Yes, Ciprofloxacin may cause harmful interaction if taken along Invokana. If taken along with Invokana, Ciprofloxacin can cause hypoglycemia (low blood glucose). Symptoms of low blood sugar include headache, dizziness, drowsiness, nervousness, confusion, tremor, nausea, hunger, weakness, perspiration, palpitation, and rapid heartbeat Severe cases of hypoglycemia can result in coma and even death. Her blood glucose should be closely monitored during treatment with Ciprofloxacin so that your diabetic regimen may be adjusted by her doctor, if needed. And you should learn to recognize the symptoms of hypoglycemia as well as what to do when these conditions occur. Hope to have answered your query. Wishing your mother a very good health.