Keflex is attributed as antibiotic of cephalosporins group which act against bacteria preventing formation of their cell walls. It is enough resistant to penicillinases of gram positive microorganims but can be destroyed by beta-lactamases of gram negative ones. It shows broad spectrum activity against gram positive microogranisms such as Staphylococcus, Staphylococcus epidermidis; Streptococcus, Corynebacterium diphtheriae, Clostridium, Actinomyces israelii, Bacillus anthracis, gram negative microorganisms like Escherichia coli, Klebsiella, Proteus mirabilis, Neisseria gonorrhoeae, Neisseria meningitidis, Shigella, Salmonella. Common infections that are treated with Keflex include infections of the middle ear, tonsils, throat, larynx (laryngitis), bronchi (bronchitis) and pneumonia as well as in urinary tract, skin, and bones.
The dose of Keflex for adults is 1 to 4 grams in divided doses. The interval between doses may be 6 or 12 hours depending on the infection. |
Hypersensitivity to Keflex, cephalosporins (Ceclor, Duricef, Omnicef, Spectracef, Suprax, Cefzil, Fortaz, Ceftin) and beta-lactamase antibiotics. Cautiousness should be exercised in patients with kidney disorder, pseudomembranous colitis, pregnancy, breastfeeding and babies younger than 6 month.
Most common side effects may include signs of allergy (hives, rash, swelling of face and tongue),
and headache with a severe blistering,
and red skin rash,
pale or yellowed skin,
dark colored urine,
confusion or weakness,
easy bruising or bleeding,
decreased or absent urination.
In case of serious and persistent side effects listed above seek for immediate medical help.
If you missed a dose take it as soon as you remember. If it almost time of your next dose just skip it and return to your regular schedule. Never double dose this medication.
In case of serious and persistent symptoms of nausea, vomiting, stomach pain, diarrhea, and blood in your urine consult your doctor about medical attention.
Store at room temperature between 59-77 degrees F (15-25 degrees C) away from light and moisture, kids and pets. Do not use after expiration term.
Medically reviewed by
Dr. Josette Davignon
Last updated: 2.06.2020