Comparing Cephalexin vs Flagyl
| Cephalexin | Flagyl (metronidazole) |
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| Cephalexin | Flagyl (metronidazole) |
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Prescription only
Cephalexin is a cephalosporin-type antibiotic that may be used in the treatment of infections caused by susceptible gram-positive bacteria. Approximately 10% of people who are allergic to penicillin... View more |
Prescription only
Flagyl is an antibiotic that is particularly effective at treating infections caused by susceptible anaerobic bacteria and parasites. Avoid alcohol while taking Flagyl and for three days after... View more |
Related suggestions Bacterial Infection
Skin or Soft Tissue Infection
Bone infection (Osteomyelitis)
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| More about Cephalexin | More about Flagyl (metronidazole) | ||||||||
| Ratings & Reviews | |||||||||
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Cephalexin has an average rating of 6.4 out of 10 from a total of 509 ratings on Drugs.com. 51% of reviewers reported a positive effect, while 28% reported a negative effect. |
Flagyl has an average rating of 6.1 out of 10 from a total of 393 ratings on Drugs.com. 45% of reviewers reported a positive effect, while 29% 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 Cephalexin side effects |
View all Flagyl side effects |
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| Drug Class | |||||||||
| Generic Availability | |||||||||
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Lower cost generic |
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| Pricing and Coupons * Prices are without insurance | |||||||||
View all Cephalexin 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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| Brand Names | |||||||||
| Keflex | Other metronidazole brands include: Flagyl 375, Flagyl IV, Likmez, Metro, Metro IV | ||||||||
| Half Life Drug half-life is the time required for plasma concentration to reduce to half its original value. | |||||||||
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1 hour |
20 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 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 53 drugs are known to interact with Cephalexin:
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A total of 378 drugs are known to interact with Flagyl:
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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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January 04, 1971 |
July 18, 1963 |
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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.
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.