Do I need to finish all my antibiotics?
You feel better halfway through — do you still need to finish the antibiotics? Here's the general guidance and the nuance behind it.
The standard advice
Take antibiotics exactly as prescribed, and finish the full course unless your prescriber tells you to stop. Feeling better doesn't always mean the infection is fully cleared.
Why it matters
- Stopping early can let the infection come back.
- It may leave behind hardier bacteria, contributing to antibiotic resistance.
The evolving nuance
Research increasingly supports shorter, prescriber-directed courses for some infections. The key point: the length should be decided by your prescriber, not by how you feel. Don't extend, shorten, or save leftovers on your own.
Other antibiotic tips
- Take doses evenly spaced, with or without food as directed.
- Separate certain antibiotics from calcium, iron, and dairy.
- Never take leftover antibiotics or someone else's.
- Ask about interactions — some affect other medicines.
Call your prescriber if: you're not improving after a few days, symptoms worsen, or you get a rash, severe diarrhea, or other reaction.
Check your own medicines free
See how your prescriptions, supplements, and food may interact — organized by the part of the body they affect.
Open the medication tool →Important: This article is educational and not medical advice. It does not replace your pharmacist or prescriber. Always confirm decisions about your medicines with a qualified professional, and call your local emergency number for emergencies. In the U.S., Poison Control is 1-800-222-1222.