ImportantThis page is general information, not a prescription. Don't start, stop, or change a medicine without talking to your provider or pharmacist.
Overview
It doesn't treat MRSA.
What it's used for
- Skin infections like cellulitis and impetigo
How to take it
- Take it on an empty stomach, 1 hour before or 2 hours after meals, with a full glass of water.
- Take it for the full course, even if you feel better.
Your dose depends on your health and other medicines. Always follow your prescription label, and ask your pharmacist if anything is unclear.
Side effects
Common side effects
- Nausea
- Diarrhea
- Stomach pain
Call 911Swelling of the face, lips, or throat, hives, or trouble breathing
Call 911A blistering, peeling, or widespread red rash, especially with fever
Call your provider todaySevere watery or bloody diarrhea, even weeks after finishing (possible C. diff infection)
Warnings
- Don't take it if you're allergic to penicillin.
Other medicines, foods, and alcohol
- It can lower warfarin's effect.
Tell your provider and pharmacist about every medicine, vitamin, and supplement you take.
Pregnancy and breastfeeding
Commonly used in pregnancy when needed.
Missed doses, overdose, and storage
If you miss a dose
Take it as soon as you remember. If it's almost time for the next dose, skip the missed one. Don't double up, and still finish the full course.
If someone takes too much
Call Poison Control at 1-800-222-1222 or get help online at poison.org. Call 911 if the person collapses, has a seizure, has trouble breathing, or can't be woken.
Storing it
Store at room temperature, away from heat and moisture (not in the bathroom), and out of reach of children and pets.
Conditions it's used for
Sources
- DailyMed: FDA drug label for Dicloxacillin (U.S. National Library of Medicine)
- MedlinePlus: Drugs, herbs, and supplements
- FDA: Drugs@FDA
Last updated 2026-11-13.