Levofloxacin
Fluoroquinolone
Also sold as Levaquin
Effect timeline
Approximate single-dose timeline. Onset shows when effects are felt; Tmax shows when blood levels peak.
Notes
Respiratory FQ; once daily.
Levofloxacin is a fluoroquinolone given by the oral route. It's typically used in the antibiotic category.
After one oral dose you'd typically start noticing the effect in 1 hr – 2 hr. The drug reaches its highest blood level in about 1 hr – 2 hr, and a single dose usually keeps working for around 1 day.
Swallow with water; check the label for food restrictions. Long-acting — take at roughly the same time each day for steady levels. Finish the full course even if you feel better.
Don't combine with other products in the same drug class without checking with a pharmacist. Stop and seek medical advice if you have an unexpected reaction, severe side effect, or symptoms that don't improve.
All timings are approximate population ranges for a typical adult dose. Individual response varies with age, genetics, formulation, food, and other medications.
Typical dosing
Source: OpenFDA drug label · adult dosing unless noted
Doses vary by age, weight, kidney/liver function, and indication. Don't change your dose without talking to your prescriber.
Verify on the exact label used:DailyMed search·OpenFDA record
Side effects & warnings
Source: OpenFDA drug label
Verify on the exact label used:DailyMed search·OpenFDA record
Educational information only — not medical advice. Times vary by person, dose, and formulation. Always consult a doctor or pharmacist for personal guidance.