Comparing Azithromycin vs Metronidazole
| Azithromycin | Metronidazole |
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| Azithromycin | Metronidazole |
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Prescription only
Azithromycin is an antibiotic used to treat a variety of different infections. It has the distinct advantage of once-daily dosing; however, diarrhea is a common side effect. Prescribed for 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 |
Related suggestions Bacterial Infection
Skin or Soft Tissue Infection
Skin and Structure Infection
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| More about Azithromycin | More about Metronidazole | ||||||||||||||||
| Ratings & Reviews | |||||||||||||||||
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Azithromycin has an average rating of 6.9 out of 10 from a total of 1299 ratings on Drugs.com. 57% of reviewers reported a positive effect, while 21% reported a negative effect. |
Metronidazole has an average rating of 6.1 out of 10 from a total of 2422 ratings on Drugs.com. 45% of reviewers reported a positive effect, while 28% reported a negative effect. |
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| Drug Class | |||||||||||||||||
| Side Effects | |||||||||||||||||
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See also: azithromycin side effects in more detail. |
See also: metronidazole side effects in more detail. |
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| Generic Availability | |||||||||||||||||
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Lower cost generic |
Lower cost generic |
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| Pricing and Coupons * Prices are without insurance | |||||||||||||||||
View all azithromycin prices |
View all metronidazole prices |
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| Dosage Forms Available | |||||||||||||||||
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| Brand Names | |||||||||||||||||
| Azithromycin Dose Pack, Z-Pak, Zithromax | 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. | |||||||||||||||||
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53 hours |
20 hours |
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| CSA Schedule ** View glossary of terms | |||||||||||||||||
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Not a controlled drug
Is not subject to the Controlled Substances Act. |
Not a controlled drug
Is not subject to the Controlled Substances Act. |
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| Pregnancy Category | |||||||||||||||||
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Category B
No proven risk in humans
See the full pregnancy warnings document. |
Category B
No proven risk in humans
See the full pregnancy warnings document. |
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| Drug Interactions | |||||||||||||||||
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A total of 355 drugs are known to interact with azithromycin:
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A total of 354 drugs are known to interact with metronidazole:
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| Alcohol/Food/Lifestyle Interactions | |||||||||||||||||
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No known alcohol/food interactions. This does not necessarily mean no interactions exist. Always consult your healthcare provider. |
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| Disease Interactions | |||||||||||||||||
| First Approval Date | |||||||||||||||||
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November 01, 1991 |
July 18, 1963 |
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| WADA Class View World Anti-Doping Agency classifications. | |||||||||||||||||
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N/A |
N/A |
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| More Information | |||||||||||||||||
| Patient resources | |||||||||||||||||
| Professional Resources | |||||||||||||||||
| Related Treatment Guide | |||||||||||||||||
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** 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.