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

I'm allergic to penicillin, will other antibiotics work against diphtheria?

5 doctors weighed in across 2 answers

Yes: Erytrhomycin is the primary backup for penicillin in this disease.

Dr Vallury and another doctor agreed

Answered 3/13/2019

6.3k views

Thank

Yes: First off, it depends on the allergic reaction. If simply a rash, then it would still be best to use penicillin and simply treat the rash. If a serious allergy, then Erythromycin based alternatives are used.

Dr Sojico agreed

Answered 6/25/2014

5.3k views

Thank

Related Questions

A member asked:

I'm allergic to penicillin. Am I also allergic to penicillin derived antibiotics?

7 doctors weighed in across 2 answers

A member asked:

If a child is allergic to mold, could he also be allergic to penicillin-based antibiotics?

A doctor has provided 1 answer

A member asked:

Hello, I have crohns disease and many antibiotics causes a sever flare up. I've had strep for almost 6wks now. Im allergic to penicillin, so that limi?

A doctor has provided 1 answer

A member asked:

If i'm allergic to penicillin, is it safe to take the antibiotic omnicef (cefdinir)?

A doctor has provided 1 answer

A member asked:

My partners allergic to penicillin i'm currently on penicillin antibiotics can we have sex?

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:

I'm allergic to penicillin, will other antibiotics work against a streptococcal b infection?
Are antibiotics prescribed after wisdom tooth removal or root canal work? If so, which ones are preferred for penicillin/amoxicillin allergic pts?
I have a skin infection and need an antibiotic but allergic to penicillin? What antibiotic is good?
I'm allergic to penicillin, my girlfriend has been taking penicillin antibiotics for a surgery, will it affect me while having sex?
What's a good antibiotic to take if your allergic to penicillin?

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.