How long does Delafloxacin stay in your system?
Last updated September 7, 2026.
**Delafloxacin has a half-life of about 4 to 8 hours, so it is mostly out of your bloodstream within a day or two after your last dose.** Both the tablet and the intravenous form clear at a similar rate, and the drug leaves your body mainly through the kidneys and stool. Reduced kidney function is the biggest reason clearance slows down, which is why your clinician may adjust the dose if your kidney numbers are low. Being cleared from the blood is not the same as being cured, so finish the full course even if you feel well after two or three days. Taking each dose at the same times daily keeps the level steady and helps the antibiotic work. Some fluoroquinolone side effects involving tendons, nerves, or mood can begin or continue after the drug is gone, so keep track of new symptoms for several weeks.
What to do
- Finish the course: Take every dose as prescribed, because feeling better does not mean the infection is fully treated.
- Space it from other pills: Take delafloxacin at least 2 hours before or 6 hours after antacids, sucralfate, and iron, zinc, magnesium, or aluminum products.
- Tell your clinician about kidney problems: Reduced kidney function slows clearance and may call for a different dose or drug.
- Watch for tendon and nerve symptoms: Stop the drug and call your clinician for sudden heel, shoulder, or wrist pain, or new numbness, tingling, or burning.
- Flag mood and nerve changes: Confusion, agitation, severe anxiety, or a seizure needs same-day medical attention, even after your last dose.
- Report ongoing diarrhea: Watery or bloody diarrhea during or up to two months after treatment should be checked, since it can signal a C. diff infection.
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