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Cephalexin: uses, side effects & brands
Cephalexin is a first-generation cephalosporin for skin, throat and urinary infections. It belongs to the Cephalosporin antibiotic group. Cephalosporins are a large family of antibiotics for many bacterial infections.
Drug type — dosing is set by your doctor
| Measure | Range |
|---|---|
| Drug class | Cephalosporin antibiotic |
| Type | Prescription |
| Dose | Individual — ask your doctor or pharmacist |
What it is used for
- Skin and soft-tissue infections
- Urine infections
- Throat and chest infections
- Bone infections
Common brand names
- India: Sporidex, Phexin, Ceff
- Worldwide: Keflex
Common side effects
- Diarrhoea
- Nausea or tummy upset
- Rash
Before taking it — precautions
- Tell your doctor if you have had a reaction to penicillin or any cephalosporin
- Tell your doctor about kidney problems
- Finish the course as prescribed, even if you feel better
When to see a doctor urgently
- Swelling of the face, lips or throat, wheezing or a widespread rash (urgent)
- Severe or bloody diarrhoea, even after the course ends
- Peeling or blistering skin (rare — urgent)
Not a prescription — no dose shown. The right dose of cephalexin depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.
Frequently asked questions
Can I take cephalexin if I'm allergic to penicillin?
Possibly, but some people react to both. Tell your doctor about any past allergy.
Does cephalexin treat viral infections like colds?
No — antibiotics do not work against viruses.
Should I finish the course?
Yes — stopping early may let the infection return.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.