Please consult your doctor for the recommended dose and duration of Floxaday 400mg Tablet You can take it with or without food at a consistent time Avoid consuming antacids containing aluminum or magnesium within 2 hours before or after taking this medicine Taking antacids sucralfate or vitaminmineral supplements too close to a dose can significantly reduce the effectiveness of the antibiotic It is important not to skip any doses and complete the full course of treatment even if you start feeling better Do not take a double dose to compensate for a missed one just take the next scheduled dose Possible side effects of this medicine include headache dizziness nausea and constipation These are usually temporary and will resolve on their own However if they persist or cause significant discomfort please consult your doctor You may also experience diarrhea as a side effect which should stop once you finish the course If it does not stop or if you notice blood in your stools inform your doctor If you are allergic to any ingredients in this medicine do not take it People with kidney problems should take special care while using this medicine