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Erythromycin Alternatives Compared

View side-by-side comparisons of medication uses, ratings, cost, side effects and interactions.
Erythromycin Amoxicillin Metronidazole
View side-by-side comparisons of medication uses, ratings, cost, side effects and interactions.
Erythromycin Amoxicillin Metronidazole
Prescription only

Prescribed for Bronchitis, Bacterial Endocarditis Prevention, Bowel Preparation, Bartonellosis, Bullous Pemphigoid, Campylobacter Gastroenteritis, Chancroid, Chlamydia Infection, Dental Abscess... View more

Prescription only

Amoxicillin is a penicillin-type antibiotic that may be used to treat infections caused by susceptible bacteria. It is usually well tolerated. Prescribed for Bacterial Infection, Bacterial... View more

Prescription only

Metronidazole is an antibiotic that is particularly effective at treating infections caused by susceptible anaerobic bacteria and parasites. Alcohol and products containing propylene glycol should... View more

More about Erythromycin More about Amoxicillin More about Metronidazole
Generic Status

Lower-cost generic is available

Lower-cost generic is available

Lower-cost generic is available
Ratings & Reviews

Erythromycin has an average rating of 6.0 out of 10 from a total of 65 ratings on Drugs.com. 41% of reviewers reported a positive effect, while 33% reported a negative effect.

Amoxicillin has an average rating of 6.3 out of 10 from a total of 363 ratings on Drugs.com. 52% of reviewers reported a positive effect, while 32% reported a negative effect.

Metronidazole has an average rating of 6.1 out of 10 from a total of 2415 ratings on Drugs.com. 45% of reviewers reported a positive effect, while 28% reported a negative effect.

View all 65 reviews

View all 363 reviews

View all 2415 reviews

Drug Class
Side Effects

See also: erythromycin side effects in more detail.

See also: amoxicillin side effects in more detail.

See also: metronidazole side effects in more detail.
Pricing and Coupons * Prices are without insurance
Quantity 3 tablet
Dosage 250 mg
Per Unit* $7.14
Cost* $21.41

View all erythromycin prices

Quantity 4 capsule
Dosage 500 mg
Per Unit* $2.48
Cost* $9.93

View all amoxicillin prices

Quantity 1 tablet
Dosage 500 mg
Per Unit* $9.72
Cost* $9.72

View all metronidazole prices

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Dosage Form(s) Available
  • Injectable powder for injection
  • Oral delayed release capsule
  • Oral delayed release tablet
  • Oral granule for reconstitution
  • Oral suspension
  • Oral tablet
  • Oral capsule
  • Oral powder for reconstitution
  • Oral tablet
  • Oral tablet, chewable
  • Oral tablet, extended release
  • Intravenous solution
  • Oral capsule
  • Oral tablet
Brand Names
E-Mycin, E.E.S. Granules, E.E.S.-200, E.E.S.-400, E.E.S.-400 Filmtab, Ery-Tab, Eryc, EryPed, Erythrocin, Erythrocin Lactobionate, Erythrocin Stearate Filmtab, Erythrocot, PCE Dispertab, Wyamycin S View more Amoxil, Apo-Amoxi Flagyl, Flagyl 375, Flagyl IV, Likmez, Metro, Metro IV
Half Life The half-life of a drug is the time taken for the plasma concentration of a drug to reduce to half its original value.

2 hours

1.7 hours

20 hours
CSA Schedule ** View glossary of terms
N
Not a controlled drug

Is not subject to the Controlled Substances Act.
N
Not a controlled drug

Is not subject to the Controlled Substances Act.
N
Not a controlled drug

Is not subject to the Controlled Substances Act.
Pregnancy Category
B
Category B No proven risk in humans

See the full pregnancy warnings document.
B
Category B No proven risk in humans

See the full pregnancy warnings document.
B
Category B No proven risk in humans

See the full pregnancy warnings document.
Drug Interactions

A total of 628 drugs are known to interact with erythromycin:

  • 193 major drug interactions (561 brand and generic names)
  • 378 moderate drug interactions (1597 brand and generic names)
  • 57 minor drug interactions (281 brand and generic names)

A total of 38 drugs are known to interact with amoxicillin:

  • 6 major drug interactions (22 brand and generic names)
  • 24 moderate drug interactions (209 brand and generic names)
  • 8 minor drug interactions (39 brand and generic names)

A total of 342 drugs are known to interact with metronidazole:

  • 12 major drug interactions (33 brand and generic names)
  • 327 moderate drug interactions (1087 brand and generic names)
  • 3 minor drug interactions (15 brand and generic names)
Alcohol/Food/Lifestyle Interactions
  • Food decreases the levels of erythromycin in your body. Take erythromycin on an empty stomach at... View more

No known alcohol/food interactions. This does not necessarily mean no interactions exist. Always consult your healthcare provider.
  • Consumption of alcoholic beverages or products containing alcohol or propylene glycol during... View more
Disease Interactions
First Approval Date

June 24, 1964

January 18, 1974

July 18, 1963
WADA Class View World Anti-Doping Agency classifications.

N/A

N/A

N/A
More Information
Patient resources
Professional Resources
Related Treatment Guide

** The Controlled Substances Act (CSA) schedule information displayed applies to substances regulated under federal law. There may be variations in CSA schedules between individual states.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Medical Disclaimer

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