Your Side Effects May IncludeAmoxicillin side effects
This side effect is printed on the FDA label for Amoxicillin. It was a question in our daily quiz, where you pick the real side effect from four choices.
A rash if you have mono
A high percentage of people with mono who take it break out in a red rash.
From the FDA label
“A high percentage of patients with mononucleosis who receive amoxicillin develop an erythematous skin rash.”
Amoxicillin label, updated Sep 9, 2026 ·
Read the full label on DailyMed
What to watch for
Tell your doctor if you might have mono. Get help right away for hives, swelling or trouble breathing.
4,649 reports to the FDA's adverse event system mention a rash. A report is not proof the drug caused it. See the query
From quiz No. 13 · October 7, 2026 · Play that quiz →
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Not medical advice. Don't stop or start a medication because of a quiz. Talk to your doctor or pharmacist. Label text and report counts from openFDA. Not affiliated with any drug maker.