An antibiotic called a cephalosporin is Keflex (cephalexin). By combating bacteria in your body, it works. Keflex is prescribed to treat a wide range of bacterial infections. Other uses for Keflex that aren't covered in this medication guide are also possible. Users of Welzo can use this article for informational purposes to better understand Keflex.

Side Effects

more frequent adverse effects



feeling exhausted


joints hurt

less frequent adverse effects

skin rash that is red, peeling, or blistered

bleeding or bruising


seizures or tremors

dark feces

fewer urinations


around lights, halo

eyes or skin that have a yellow tint

uncommon side effects



soiled stools

fuzzy vision

chest discomfort or pain


Serious side effects are possible with Keflex. If you have: Stop taking Keflex and contact your physician right away.

severe abdominal pain, bloody or watery diarrhea;

kidney issues: infrequent or no urination, swelling, blood in the urine;


Hives, fever, swollen glands, joint pain, general malaise, unusual bruising or bleeding, extreme exhaustion, nausea, vomiting, rapid breathing, skin rash, and itching are symptoms of a severe allergic reaction.



For the majority of bacterial infections, a dose of 250 mg every 6 hours or 500 mg every 12 hours is advised. You can take Keflex with or without food.

The recommended dose for an adult to treat a bladder infection is 3 grams (mg) in one dose. Keflex needs to be taken at regular intervals.

How does Keflex work?

Keflex is a member of the cephalosporin antibiotics drug class. A class of drugs is a collection of drugs with similar mechanisms of action. Similar conditions are frequently treated with these medications. Keflex works by eliminating the infection-causing bacteria.