Cephalexin

Cephalexin is an antibiotic that belongs to the cephalosporin class of drugs. It is commonly used to treat bacterial infections in various parts of the body.

This medication works by stopping the growth of bacteria, helping your body to overcome the infection.

Information about Cephalexin

Cephalexin Uses

Cephalexin is used to treat a variety of bacterial infections. It is effective in managing infections in different parts of the body.

Respiratory tract infections
Skin and soft tissue infections
Bone infections
Ear infections
Urinary tract infections

How Cephalexin Works

Cephalexin works by interfering with the formation of the bacterial cell wall. This action weakens the cell wall, causing the bacteria to burst and die.

As a cephalosporin antibiotic, it targets a broad range of bacteria, making it effective against many common bacterial infections.

Common side effects of Cephalexin

Not everyone will experience side effects from Cephalexin, and many side effects are mild and temporary. However, some people may experience certain symptoms.

Nausea
Diarrhea
Stomach upset
Vomiting
Dizziness
Fatigue

If you experience serious or persistent symptoms, contact your doctor.

CONTENT DETAILS

Written By

Douglas C. Goldberg, MD

Reviewed By

Philip Schein, MD

Last updated

28 Nov 2025 | 03:00 PM (UTC)

Medicine brands for Cephalexin

Keftab
Dosage: 125mg, 250mg, 375mg, 500mg, 750mg
from $33.0032 variant(s)
Cephadex
Dosage: 250-mg, 500-mg
from $13.007 variant(s)
Keflex
Dosage: 250mg, 500mg, 750mg
from $39.0018 variant(s)
Cephalexin
Dosage: 250mg, 500mg
from $34.0014 variant(s)
Phexin
Dosage: 500mg
from $56.006 variant(s)

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Expert advice for Cephalexin

Take Cephalexin with or without food as directed by your healthcare provider.
Avoid consuming alcohol while taking this medication.
Inform your doctor about any allergies you have, especially to antibiotics.
Do not use this medication if you have a history of severe kidney problems without consulting your doctor.
Complete the full course of treatment even if you feel better.

Always consult your doctor for personalized medical advice.

Frequently Asked Questions

How quickly does Cephalexin start working?

Cephalexin starts working soon after you begin taking it, but it may take a few days to notice improvement in symptoms.

Can I drink alcohol while taking Cephalexin?

It is advisable to avoid alcohol while taking Cephalexin, as it may increase the risk of certain side effects.

Is Cephalexin safe for everyone?

Cephalexin is generally safe for most people, but you should inform your doctor about any allergies or medical conditions you have.

What should I do if I miss a dose of Cephalexin?

If you miss a dose, take it as soon as you remember. If it’s almost time for your next dose, skip the missed dose and continue with your regular schedule.

Can Cephalexin interact with other medications?

Yes, Cephalexin can interact with other medications. Inform your doctor about all the medicines you are taking to avoid potential interactions.