(levofloxacin in 5% dextrose) Injection, for Intravenous Use. Read the Medication Guide that comes with LEVAQUIN ® before you start taking it and each time you get a refill. There may be new. Take levofloxacin exactly as your doctor tells you to. The usual dose is 500 mg daily, although for some types of infection a dose of 250 mg daily is sufficient, and for others, 500 mg twice daily is needed. Read the label carefully to make sure you know what dose is right for you. You can take levofloxacin before or after meals. If you are. Although multi-dose levofloxacin eye drops commonly contain preservatives, preservative-free unit dose vials may be available. Patient and carer advice For all QUINOLONES. See QUINOLONES. For LEVOFLOXACIN. When used by inhalation in adults. Manufacturer advises patients and carers should be given advice on how to administer levofloxacin. Missed doses. When used by inhalation in adults. Levofloxacin oral liquid should be taken 1 hour before or 2 hours after eating. Measure your dose with a marked measuring spoon, oral syringe, or medicine cup. You may take levofloxacin tablets with meals or on an empty stomach. This medicine is best taken with a full glass (8 ounces) of water. Several additional glasses of water should be taken every day, unless otherwise directed by your.