Comparing Metronidazole vs Rifaximin
| Metronidazole | Rifaximin |
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| Metronidazole | Rifaximin |
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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 |
Prescription only
Prescribed for Hepatic Encephalopathy, Irritable Bowel Syndrome with Diarrhea, Irritable Bowel Syndrome, Traveler's Diarrhea, Diarrhea, Crohn's Disease, Diarrhea - Chronic. Rifaximin may also be used... View more |
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| More about Metronidazole | More about Rifaximin | ||||||||
| Ratings & Reviews | |||||||||
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Metronidazole has an average rating of 6.0 out of 10 from a total of 2433 ratings on Drugs.com. 44% of reviewers reported a positive effect, while 29% reported a negative effect. |
Rifaximin has an average rating of 6.6 out of 10 from a total of 159 ratings on Drugs.com. 58% of reviewers reported a positive effect, while 32% reported a negative effect. |
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| Side Effects Experienced by Users Side effects are reported in Drugs.com user reviews and not clinically verified. | |||||||||
View all Metronidazole side effects |
View all Rifaximin side effects |
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| Drug Class | |||||||||
| Generic Availability | |||||||||
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Lower cost generic |
N/A |
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| Pricing and Coupons * Prices are without insurance | |||||||||
View all Metronidazole prices |
We could not find an exact match for this medicine. Try searching the Price Guide directly. |
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| Dosage Forms | |||||||||
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N/A |
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| Brand Names | |||||||||
| Flagyl, Flagyl 375, Flagyl IV, Likmez, Metro, Metro IV | Xifaxan | ||||||||
| Half Life Drug half-life is the time required for plasma concentration to reduce to half its original value. | |||||||||
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20 hours |
10.19 hours |
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| CSA Schedule 1 View glossary of CSA 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 C
Risk cannot be ruled out
See the full pregnancy warnings document. |
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| Drug Interactions | |||||||||
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A total of 392 drugs are known to interact with Metronidazole:
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A total of 92 drugs are known to interact with Rifaximin:
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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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July 18, 1963 |
May 25, 2004 |
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| WADA Class View 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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1 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.
See also:
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.