what is keflex used for

2 min read 08-03-2025

Keflex, also known by its generic name cephalexin, is a widely prescribed antibiotic. It's a first-generation cephalosporin, meaning it's part of a family of antibiotics that work by interfering with the bacteria's ability to build their cell walls. This ultimately leads to the death of the bacteria. Understanding what Keflex is used for requires knowing its specific targets and how it's administered.

Common Infections Treated with Keflex

Keflex is effective against a range of bacterial infections. Its primary uses include treating:

Skin Infections

Keflex is frequently prescribed for various skin infections, including:

Cellulitis: A common bacterial skin infection causing redness, swelling, and pain.
Impetigo: A highly contagious skin infection characterized by sores and blisters.
Abscesses: Pus-filled lesions that often require drainage alongside antibiotic treatment.
Folliculitis: Infection of hair follicles, leading to inflammation and pimples.

The effectiveness of Keflex against skin infections depends on the specific bacteria causing the infection. Your doctor will determine the appropriate treatment based on a diagnosis.

Respiratory Infections

While not as commonly used for respiratory infections as other antibiotics, Keflex may be prescribed for certain cases of:

Pneumonia: A lung infection, although other antibiotics are often preferred for this condition.
Bronchitis: Inflammation of the bronchial tubes.
Sinusitis: Infection of the sinuses.

The choice of antibiotic depends heavily on the type of bacteria causing the respiratory infection.

Ear Infections (Otitis Media)

Keflex can be used to treat ear infections, particularly in children. However, antibiotic resistance is a growing concern, and other antibiotics might be preferred depending on the infection's severity and the specific bacteria involved. Always consult a doctor before treating an ear infection.

Urinary Tract Infections (UTIs)

Keflex is sometimes used to treat uncomplicated UTIs. However, other antibiotics are often more effective and are usually the preferred choice for UTIs. Again, a doctor should diagnose and recommend the best course of action.

How Keflex is Administered

Keflex is typically administered orally as capsules or tablets. The dosage and duration of treatment vary depending on the infection's severity and the patient's overall health. Always follow your doctor's instructions carefully.

Important Considerations and Side Effects

Before taking Keflex or any medication, inform your doctor about any allergies, pre-existing medical conditions, or medications you are currently taking. Common side effects can include:

Nausea
Diarrhea
Vomiting
Stomach pain
Rash
Itching

More serious side effects are rare but possible. Seek immediate medical attention if you experience severe allergic reactions (such as difficulty breathing, swelling, or hives), severe diarrhea, or any other concerning symptoms.

When to See a Doctor

It's crucial to see a doctor for any suspected bacterial infection before starting any antibiotic treatment. They can properly diagnose the infection and prescribe the most appropriate antibiotic. Self-treating infections can lead to complications and the development of antibiotic-resistant bacteria.

Conclusion

Keflex (cephalexin) is an effective antibiotic used to treat a range of bacterial infections, primarily skin infections. However, its use is becoming more selective due to increasing antibiotic resistance. Always consult your doctor for a proper diagnosis and treatment plan before using Keflex or any other antibiotic. Never self-medicate, and always follow your doctor's prescribed dosage and treatment duration precisely. Remember that Keflex is not effective against viral infections.