Comparing Keflex vs Zosyn
| Keflex (cephalexin) | Zosyn (piperacillin / tazobactam) |
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| Keflex (cephalexin) | Zosyn (piperacillin / tazobactam) |
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Prescription only
Keflex is a cephalosporin-type antibiotic that may be used in the treatment of gram-positive cocci infections. However, it should be used with caution in people with a penicillin allergy. Prescribed... View more |
Prescription only
Prescribed for Aspiration Pneumonia, Bacteremia, Appendicitis, Appendectomy, Bone infection, Deep Neck Infection, Endometritis, Febrile Neutropenia, Intraabdominal Infection, Joint Infection, Kidney... View more |
Related suggestions Skin or Soft Tissue Infection
Kidney Infections (Pyelonephritis)
Bone infection (Osteomyelitis)
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| More about Keflex (cephalexin) | More about Zosyn (piperacillin / tazobactam) | |
| Ratings & Reviews | ||
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Keflex has an average rating of 7.3 out of 10 from a total of 91 ratings on Drugs.com. 66% of reviewers reported a positive effect, while 20% reported a negative effect. |
Zosyn has an average rating of 8.0 out of 10 from a total of 5 ratings on Drugs.com. 60% of reviewers reported a positive effect, while 0% 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 Keflex side effects |
View all Zosyn side effects |
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| Drug Class | ||
| Generic Availability | ||
| Lower cost generic approved | Lower cost generic approved | |
| 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. |
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 | ||
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N/A |
N/A |
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| 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 |
3.6 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 Keflex:
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A total of 71 drugs are known to interact with Zosyn:
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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. |
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 |
October 22, 1993 |
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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.