Taking levoflox750 once in night but feeling uneasiness short breath also nausea and dizziness should i take the medicine with antacid(once/twice day)?

Levofloxacin reactio: Levofloxacin is a long-acting antibiotic intended for once daily use. Like any medication, it can causes adverse effects--either intolerance or allergy. The reaction you describe is fairly severe, and I have particular concern about the shortness of breath, which is a serious symptom. If this is caused by the medication, then it is an allergic response and you shouldn't take any more.