Flagyl ER Alternatives Compared
| Flagyl ER | Metronidazole | Clindamycin |
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| Flagyl ER (metronidazole) | Metronidazole | Clindamycin |
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Prescription only
Prescribed for Bacterial Vaginosis, Balantidium coli, Dientamoeba fragilis, Nongonococcal Urethritis, STD Prophylaxis. 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 6.1 out of 10 from a total of 2420 ratings on Drugs.com. 45% of reviewers reported a positive effect, while 28% reported a negative effect. |
Clindamycin has an average rating of 5.8 out of 10 from a total of 804 ratings on Drugs.com. 44% of reviewers reported a positive effect, while 35% reported a negative effect. |
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| Drug Class | ||||||||||||||||||
| Side Effects | ||||||||||||||||||
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See also: Flagyl ER side effects in more detail. |
See also: metronidazole side effects in more detail. |
See also: clindamycin side effects in more detail. |
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| 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 Available | ||||||||||||||||||
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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 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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20 hours |
20 hours |
3.4 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. |
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 353 drugs are known to interact with Flagyl ER:
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A total of 353 drugs are known to interact with metronidazole:
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A total of 87 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 World Anti-Doping Agency classifications. | ||||||||||||||||||
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N/A |
N/A |
N/A |
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| 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.