This text is for informational purposes only. Please consult a doctor or pharmacist before using any medication. 

Read the information leaflet that comes with the medication.

If after taking Keflex, a sudden allergic reaction (anaphylaxis) is felt, with symptoms like swelling of the face, swelling of the tongue or throat making it difficult to breathe or swallow, or there is wheezing, hives, rash, blistering or peeling of the skin, call a doctor or 911 right away, or go to an emergency room immediately.

Other serious side effects that can occur are extensive skin peeling or blistering or acute diarrhea. If these occur, stop taking the capsules and consult a doctor immediately.

Most people who use Keflex do not experience any adverse side effects. Doctors prescribe Keflex because they assess the benefits of such treatment outweigh any likely unwanted effects.

Some of the side effects that have been reported include:

• Abdominal pain
• Nausea or vomiting
• Diarrhea, heartburn or indigestion
• Pus in the eyes
• Skin bruising
• Yellowing of the skin and eyes (jaundice)

Not all side effects are listed here. If these or other unlisted symptoms persist or worsen, consult a healthcare provider or pharmacist.

Keflex is designed to be used in the treatment of bacterial infections such as:

• Upper respiratory tract infections
• Middle ear infections
• Skin infections
• Urinary tract infections
• Bone infections.

Keflex can also be prescribed to prevent heart valve infections (also known as bacterial endocarditis) in penicillin-allergic individuals with heart problems undergoing dental or upper respiratory tract (nose, mouth, throat, voice box) surgery.