Medication class

Antibiotics

Anti-infective drugs that treat bacterial infections, including penicillins, cephalosporins, macrolides, and fluoroquinolones.

Data updated 2026-05-15

56
Medications
40
With a generic
62%
Avg generic savings
4
In active shortage

Drug class assignments follow the FDA openFDA therapeutic classification, clinical details are drawn from FDA Structured Product Labeling via DailyMed, and unit-price comparisons use CMS National Average Drug Acquisition Cost data. See the full sources below.

Inventory versus report volume

Antibiotics is inventory #2 of 22 (56 drugs) ≠ FAERS-volume #14. Nationally Mental Health is inventory #1 of 22 (77 drugs) ≠ Pain Relief FAERS-volume #1 at inventory #3.

#2
inventory
56
tracked drugs
#14
FAERS volume
#1
Pain Relief FAERS nationally

According to FDA FAERS report totals and openFDA class inventory compiled on /methodology. Class size is not the same map as report volume. This page is for informational purposes only and is not medical advice.

This class - generic availability cut

Exclusive DISTINCT-drug split of 56 medicines in Antibiotics. Orthogonal to inventory vs FAERS dual and to the NADAC cost ChartBar.

fidaxomicin tops Antibiotics NADAC at $239.00/unit

Top 10 acquisition costs in this class (CMS NADAC)

per unit

What this shows fidaxomicin is the costliest in this class at $239.00/unit; generics in the same class run a fraction of that.

Source CMS National Average Drug Acquisition Cost (NADAC)

Antibiotics · #2 inventory of 22 therapeutic classes

20 classes have fewer tracked drugs; percentile 91 among PlainMeds categories.

Antibiotics vs all classes by tracked-drug count

Where this class's inventory sits among every PlainMeds therapeutic category

56 2nd of 22 higher than 20 of 22 classes

Classes, banded by tracked-drug inventory

Each bar is a band; taller bars hold more classes. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source PlainMeds openFDA therapeutic-class inventory · 2026-05-15

amikacin

Amikin

Amikacin is an antibiotic medicine.

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amoxicillin

Amoxil

Amoxicillin and Clavulanate Potassium is a combination medicine used to fight bacterial infections.

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amoxicillin/clavulanate

Augmentin

Augmentin is a combination of two medicines, amoxicillin and clavulanate.

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ampicillin/sulbactam

Unasyn

Unasyn is a combination of two antibiotics that fights bacteria in your body.

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azithromycin

Zithromax, Z-Pack

Azithromycin is an antibiotic that fights bacteria.

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cefazolin

Ancef, Kefzol

Cefazolin is an antibiotic medicine.

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cefdinir

Omnicef

Cefdinir is an antibiotic that fights bacteria in your body.

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cefepime

Maxipime

Cefepime is an antibiotic medicine.

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cefixime

Suprax

Cefixime is an antibiotic that fights bacteria in your body.

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cefpodoxime

Vantin

Cefpodoxime is an antibiotic that fights bacterial infections.

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ceftaroline

Teflaro

Ceftaroline (Teflaro) is an antibiotic medicine.

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ceftazidime

Fortaz

Ceftazidime is an antibiotic medicine.

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ceftazidime/avibactam

Avycaz

Avycaz is a drug that combines two medicines, ceftazidime and avibactam.

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ceftolozane/tazobactam

Zerbaxa

Zerbaxa is a combination of two antibiotics, ceftolozane and tazobactam.

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ceftriaxone

Rocephin

Ceftriaxone is an antibiotic medicine.

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cefuroxime

Ceftin, Zinacef

Cefuroxime is an antibiotic that fights bacterial infections.

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cephalexin

Keflex

Cephalexin is an antibiotic medicine.

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ciprofloxacin

Cipro

Ciprofloxacin eye drops are an antibiotic medicine.

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clarithromycin

Biaxin

Clarithromycin is an antibiotic that fights bacterial infections.

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clindamycin

Cleocin

Clindamycin phosphate topical lotion is an antibiotic medicine that you put on your skin.

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colistin

Coly-Mycin M

Cortisporin TC Otic is an ear drop medicine.

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dalbavancin

Dalvance

Dalbavancin is an antibiotic medicine.

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daptomycin

Cubicin

Daptomycin is an antibiotic medicine.

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delafloxacin

Baxdela

Baxdela is an antibiotic that fights bacteria in your body.

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dicloxacillin

Dynapen

Dicloxacillin is an antibiotic that fights bacteria in your body.

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doxycycline

Vibramycin, Doryx

Doxycycline is an antibiotic medicine.

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eravacycline

Xerava

Xerava is an antibiotic medicine.

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ertapenem

Invanz

Ertapenem is an antibiotic medicine.

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erythromycin

E-Mycin, Ery-Tab

Erythromycin Topical Solution is a medicine that you put on your skin to treat acne.

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fidaxomicin

Dificid

Fidaxomicin is an antibiotic medicine.

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fosfomycin

Monurol

Fosfomycin is an antibiotic medicine.

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gentamicin

Garamycin

Gentamicin is an antibiotic medicine.

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imipenem/cilastatin

Primaxin

Primaxin is a strong antibiotic medicine.

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lefamulin

Xenleta

Xenleta is an antibiotic medicine.

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levofloxacin

Levaquin

Levofloxacin is an antibiotic that fights bacteria in your body.

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linezolid

Zyvox

Linezolid is an antibiotic that fights bacteria in your body.

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meropenem

Merrem

Meropenem is an antibiotic medicine.

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meropenem/vaborbactam

Vabomere

Vabomere is a drug that combines two medicines to fight certain infections.

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metronidazole

Flagyl

Metronidazole is an antibiotic medicine.

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minocycline

Minocin, Solodyn

Minocycline is an antibiotic that fights bacteria in your body.

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moxifloxacin

Avelox

Moxifloxacin is an antibiotic that fights bacteria in your body.

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nitrofurantoin

Macrobid, Macrodantin

Nitrofurantoin is an antibiotic medicine.

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ofloxacin

Floxin, Ocuflox

Ofloxacin ear drops are an antibiotic medicine.

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omadacycline

Nuzyra

Nuzyra is an antibiotic medicine.

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oritavancin

Orbactiv

KIMYRSA is an antibiotic medicine.

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penicillin V

Pen-Vee K

Penicillin V is an antibiotic.

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piperacillin/tazobactam

Zosyn

Zosyn is a combination of two medicines, piperacillin and tazobactam.

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plazomicin

Zemdri

Zemdri is an antibiotic medicine.

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rifampin

Rifadin

Rifampin is an antibiotic medicine.

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sulfamethoxazole/trimethoprim

Bactrim, Septra

Sulfamethoxazole and trimethoprim is a combination antibiotic.

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tedizolid

Sivextro

Tedizolid (Sivextro) is an antibiotic medicine.

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tetracycline

Sumycin

Tetracycline is an antibiotic medicine.

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tigecycline

Tygacil

Tigecycline is an antibiotic medicine.

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tobramycin

Tobi, Nebcin

Tobramycin is an antibiotic medicine.

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trimethoprim

Primsol

This medicine contains sulfamethoxazole and trimethoprim.

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vancomycin

Vancocin

Vancomycin is a strong antibiotic.

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Compare amikacin vs amoxicillin side-by-side →

Antibiotics · large class with 4 active shortages

Antibiotics is inventory #2 of 22 (56 drugs) ≠ FAERS-volume #14. Nationally Mental Health is inventory #1 of 22 (77 drugs) ≠ Pain Relief FAERS-volume #1 at inventory #3. 56 medicines tracked; 40 carry a NADAC generic flag; 4 in active FDA shortage.

← Back to all drugs

Classes nearest Antibiotics by inventory size

Pain Relief 55 Blood Pressure 54 Diabetes 43 Infections 41 Skin 41 Acid Reflux & Stomach 38 Respiratory 36 Mental Health 77

Read our methodology - how this data is sourced, computed, and verified.