HealthTap Online Primary Care Doctors Accepting New Patients
Book a video visit
HealthTap
Telehealth
A member asked:

How long does the rash of penicillin with mononucleosis take to clear up?

A doctor has provided 1 answer
Dr. Michael Ein answered

Specializes in Infectious Disease

7 days: The rash could get worse for 1-2 days after stopping the penicillin. It will then gradually fade over about a week.

Dr Maes and another doctor agreed

Answered 2/9/2017

4.9k views

Thank

Related Questions

A member asked:

How long does it take before syphilis rash on back goes away? Was Diagnosed with neuropsyphilis and IV therapy of penicillin has been completed.

A doctor has provided 1 answer

A member asked:

Was able to take penicillin as a kid for tonsillitis. Had one reaction of a rash when i was 10. Is this an allergy?

A doctor has provided 1 answer

A member asked:

I stopped taking penicillin 6 days ago and ever since the last day I took it I have whole body itching with no rash. Is this an allergy and how long can it take to go away? I was only in a 3 day course.

A doctor has provided 1 answer

A member asked:

How much time does it take for a rash to go away thats an allergic reaction to penicillin?

3 doctors weighed in across 2 answers

A member asked:

Help please? How long does it take for a rash to go away thats an allergic reaction to penicillin?

A doctor has provided 1 answer

Sponsored Content
HealthTap Medical Group does not endorse products or services. Sponsored content revenues support our mission to make health information free and accessible to all.Learn more

People also searched for:

On my CBC test my monocytes was normal but my monocytes absolute was high. Why is that? Had mono a month earlier broke out in rash etc from penicillin
I had had an amoxicillin rash due to mono 6 years ago. Am I allergic to penicillin?
Had mono & strept didnt know and took penicillin etc. Had rash, joint pain. Ana came back positive rnp high. Doc said mono&strept was the cause. true?
How long does a penicillin allergy rash take to clear?
How long does it take a rash due to a penicillin allergy to clear?

Telemedicine

Primary Care
Manage Your Conditions
Women's Health
Children's Health
Men's Health
Senior Health
Wellness, Prevention & Lifestyle
Sexual Health
Mental & Behavioral Health
Travel Medicine
Urgent Care
Ask your question
Didn't find what you're looking for?

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.

Ask your question

More of what we treat

Allergies
Antibiotics
Asthma
High Blood Pressure
Prescriptions
Type 2 Diabetes
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.
HealthTap
HIPAA logo
HIPAASecure
Soc 2 Type 2 logo
SOC 2 Type 2Certified
JCAHO Accredited
JCAHOAccredited
Member App

Download HealthTap

Video visit and message your doctor

Member App QR Code
Play Store Member LinkApp Store Member Link

Questions?

+1 (888) 828-0841support@healthtap.com
LinkedInTwitter
HomeTermsPrivacyCookiesDMCAHealth TopicsDoctors DirectoryDoctor Q&A by Specialty
Copyright 2026 HealthTap, Inc.