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How Long Will Hives Last From An Allergic Reaction To Antibiotics. Typically hives due to a medication will last for only a few days. Send thanks to the doctor Dr. Dizziness and lightheadedness are two possible signs of an allergy to cephalexin. The rash usually appears after an hour or two after taking amoxicillin.
Amoxicillin is an antibiotic frequently recommended in the treatment of childhood ear infections and respiratory infections. James Rochester answered Family Medicine 26. Send thanks to the doctor Dr. How long will an allergic reaction rash from keflex last. Hives may occur as a result of an allergic reaction. The rash usually appears after an hour or two after taking amoxicillin.
The rash is not contagious and usually begins to fade after 3 days but may take up to 6 days to disappear.
It is accompanied by hives itching and difficulty swallowing and breathing. Exanthems often occur several days into a course of an antibiotic. People taking amoxicillin may also develop hives. The rash may wax and wane in severity. Hives may occur as a result of an allergic reaction. Dizziness and lightheadedness are two possible signs of an allergy to cephalexin.