Comparing Bactrim vs Cephalexin
| Bactrim Remove Bactrim from your drug comparison | Cephalexin Remove Cephalexin from your drug comparison |
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| Bactrim sulfamethoxazole / trimethoprim Remove Bactrim from your drug comparison | Cephalexin Remove Cephalexin from your drug comparison | ||||||||||||||||
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Bactrim is an effective combination antibiotic; however, it may not be suitable for those with kidney or liver disease or folate deficiency. The risk of side effects may be higher in the elderly.... View more |
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 |
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Prescription only |
Prescription only |
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Ratings & ReviewsRecent helpful reviews |
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5.5
For Urinary Tract Infection: Bactrim cleared up my urinary tract infection, but gave me a raging yeast infection. I now request Keflex for UTI's. |
6.5
For Skin or Soft Tissue Infection: Cephalexin got rid of infection but I had horrible side effects. I took it for 4 days, at a dose of 500mg, 4 times a day. I had horrible headaches, diarrhea, major depression, eyes dry and blood shot, nausea, very tired, didn't have motivation to do anything. Anxiety, joints were on fire! Stopped a day ago and still feel awful! Won't take again because of side effects. For Skin or Soft Tissue Infection: Have bursitis on left elbow didn't know if was infected or not so they have me keflex twice a day only side effect I had was it tore my belly up |
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Drug Class |
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Side Effects |
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See the full Bactrim side effects document. |
See the full cephalexin side effects document. |
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Pricing and Coupons* Prices are without insurance |
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View all Bactrim prices and generic prices |
View all cephalexin prices |
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Generic Availability |
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Yes (this medicine) |
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Dosage Form(s) Available |
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Brand Names |
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| Other sulfamethoxazole / trimethoprim brands include: Bactrim DS, Bactrim IV, Bactrim Pediatric, Bethaprim, Bethaprim Pediatric, Co-trimoxazole, Septra, Septra DS, SMZ-TMP DS, Sulfatrim Pediatric View more | Keflex | ||||||||||||||||
Half LifeThe 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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14 hours |
1 hour |
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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 D
Positive evidence of risk
See the full Pregnancy Warnings document. |
Category B
No proven risk in humans
See the full Pregnancy Warnings document. |
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FDA Alerts |
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N/A |
N/A |
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Drug Interactions |
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A total of 366 drugs are known to interact with Bactrim:
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A total of 26 drugs are known to interact with cephalexin:
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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 |
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First Approval Date |
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July 30, 1973 |
January 04, 1971 |
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WADA ClassView World Anti-Doping Agency classifications. |
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N/A |
N/A |
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More Information |
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Consumer Resources |
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Professional Resources |
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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.
For Urinary Tract Infection: I mean a lot of people on here are saying it didn’t work that’s probably because you have a different strain of bacteria from your UTI. It’s a guess & checking game until your urine culture comes back. Yep every two months I get a freaking UTI. I have one now:)) and am on bactrim I think it’s my second time. First time worked now I think I have a different strain. If you don’t eat yogurt before you take it prepare for extreme nausea and feeling like you’re on a horrible drug. Literally makes my eyes dilate. I feel high and nauseous. Taking a drug this strong especially for first guess diagnosis of strains is so idiotic. Refuse if your doctor prescribes it as a first guess. Don’t put your body through that unnecessarily. Seriously.