Flagyl ER Alternatives Compared
| Flagyl ER (metronidazole) | Metronidazole | Clindamycin |
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| Flagyl ER (metronidazole) | Metronidazole | Clindamycin |
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Prescription only
Prescribed for STD Prophylaxis, Bacterial Vaginosis, Balantidium coli, Dientamoeba fragilis, Nongonococcal Urethritis. Flagyl ER may also be used for purposes not listed in this medication guide. |
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
Clindamycin is an antibiotic that is usually reserved for treating anaerobic infections or other serious infections caused by gram-positive bacteria in penicillin-allergic people. The risk of C... View more |
Related suggestions Bacterial Vaginosis
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| More about Flagyl ER (metronidazole) | More about Metronidazole | More about Clindamycin | ||||||||||||||||
| Ratings & Reviews | ||||||||||||||||||
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Flagyl ER has an average rating of 6.4 out of 10 from a total of 8 ratings on Drugs.com. 50% of reviewers reported a positive effect, while 25% reported a negative effect. |
Metronidazole has an average rating of 6.0 out of 10 from a total of 2431 ratings on Drugs.com. 44% of reviewers reported a positive effect, while 29% reported a negative effect. |
Clindamycin has an average rating of 5.7 out of 10 from a total of 807 ratings on Drugs.com. 43% of reviewers reported a positive effect, while 35% 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. | ||||||||||||||||||
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View all Flagyl ER side effects |
View all Metronidazole side effects |
View all Clindamycin side effects |
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| Drug Class | ||||||||||||||||||
| Generic Availability | ||||||||||||||||||
| Lower cost generic approved |
Lower cost generic |
Lower cost generic |
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| Pricing and Coupons * Prices are without insurance | ||||||||||||||||||
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We could not find an exact match for this medicine. Try searching the Price Guide directly. |
View all Metronidazole prices |
View all Clindamycin prices |
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| Dosage Forms | ||||||||||||||||||
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| Brand Names | ||||||||||||||||||
| Other metronidazole brands include: Flagyl, Flagyl 375, Flagyl IV, Likmez, Metro, Metro IV | Flagyl, Flagyl 375, Flagyl IV, Likmez, Metro, Metro IV | Cleocin, Cleocin HCl, Cleocin Pediatric, Cleocin Phosphate, Cleocin Phosphate ADD-Vantage | ||||||||||||||||
| 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 |
20 hours |
3.4 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. |
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. |
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 378 drugs are known to interact with Flagyl ER:
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A total of 378 drugs are known to interact with Metronidazole:
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A total of 110 drugs are known to interact with Clindamycin:
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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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N/A |
July 18, 1963 |
February 22, 1970 |
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| WADA Class View classifications | ||||||||||||||||||
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N/A |
N/A |
N/A |
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| More Information | ||||||||||||||||||
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| 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.