If you experience any of the following serious Keflex side effects,
stop taking Keflex/cephalexin and seek emergency medical attention or
contact your doctor immediately: an allergic reaction (difficulty breathing,
closing of the throat, swelling of the lips, face, or tongue, hives or a rash),
rash, redness, or itching, severe nausea, vomiting, or diarrhea, mucous
or blood in the stool, or unusual bleeding or bruising.
Less serious Keflex side effects may be more likely to occur. Continue
to take Keflex
| Read More on What are the possible side effects of Keflex?