Last updated: June 8, 2026
Zosyn in Plastic Container Suppliers: Who Manufactures Piperacillin/Tazobactam Plastic-Container Presentations for US Markets?
Zosyn (piperacillin/tazobactam) is supplied by Pfizer as the marketed brand. The specific “plastic container” presentation is typically supplied through Pfizer’s manufacturing network and distribution channels; third-party manufacturers supplying finished plastic-container units in the US depend on the specific package type (e.g., Viaflex/mini-bag equivalents, volume, and NDC configuration).
What suppliers matter for procurement and IP due diligence: the finished-dose holder (market authorization and label holder), contract manufacturing entities producing the plastic-container units, and packaging suppliers that provide the final container system used for administration.
Who supplies Zosyn (piperacillin/tazobactam) in plastic containers in the US?
Answer: The commercial supplier is Pfizer, as the brand owner and label holder for Zosyn. The “plastic container” units are manufactured and packaged under Pfizer’s approved manufacturing system(s) for that dosage form and NDC.
Key supply-chain roles
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Label holder / brand supplier
- Pfizer (Zosyn US label holder for brand-market distribution).
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Manufacturing sites producing drug product
- Pfizer-approved sterile drug manufacturing facilities responsible for piperacillin/tazobactam bulk drug product and sterile filling into the plastic container system for the specific presentation.
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Container-closure system provider
- Suppliers of the plastic container system (administration bag and closure components) used for the sterile product. These providers may be shared across multiple sterile beta-lactam brands but the final container system used for Zosyn depends on the specific NDC.
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Distribution logistics
- Wholesalers and pharmacy distribution networks handle fulfillment, but they are not “manufacturers” of the plastic container unit.
Which companies manufacture Zosyn in plastic bags (Viaflex-style containers) for Pfizer?
Answer: The manufacturers producing the final sterile plastic-container presentation are Pfizer’s approved sterile manufacturing contractors and/or Pfizer-owned sterile sites. The container system is supplied by a container-closure supplier used within Pfizer’s packaging qualification program.
How to identify the actual manufacturing plants for a given NDC
For procurement and vendor qualification, the controlling artifacts are:
- FDA label section “Manufactured by” for that NDC
- FDA “Drug Label Information” package
- NDC-specific packaging information tied to the container volume and configuration
These documents determine:
- the listed manufacturer(s) for the finished plastic-container product
- the packager/labeler details
- the site producing under the approved NDA
What is the FDA/NDC mapping for Zosyn plastic-container presentations?
Answer: Each plastic-container presentation corresponds to specific NDC numbers and label configurations. Supplier identification must be NDC-specific because Pfizer can change manufacturing sites and packaging partners while keeping the same active ingredient and brand.
What typically varies across Zosyn plastic-container SKUs
- bag volume (e.g., standardized dosing volumes)
- sterility assurance process details tied to container system
- packaging type and configuration
- NDC changes that re-point to different manufacturing sites or packaging line qualification
What suppliers provide the plastic container-closure system for Zosyn?
Answer: Container-closure suppliers provide the administration bag and closures used in the approved container-closure system. The exact supplier name is NDC- and label-dependent and appears through packaging qualification documentation and/or label manufacturing/packaging statements.
What to look for in documentation
- The label’s “Manufactured by” / “Packaged by” lines for the NDC
- If present, the container-closure system brand naming conventions used in labeling
- Procurement dossiers aligned to lot-level traceability
How do contract manufacturing suppliers change Zosyn plastic-container availability?
Answer: Changes in manufacturing site or packaging line qualification affect:
- lead times for plastic-container SKUs
- regional distribution allocation
- lot consistency and supply continuity
These changes are typically managed within Pfizer’s supply chain through:
- approved alternate manufacturing facilities
- qualified sterilization and filling lines that maintain container integrity and sterility assurance
- container-closure components qualified for compatibility and stability
Which distributors supply Zosyn plastic-container product to hospitals and wholesalers?
Answer: Distributors are the primary route to hospitals and IDNs in most US markets. They are usually not the “suppliers” of the plastic container unit, but they control availability and delivery.
Typical procurement channels
- Group purchasing organizations and hospital pharmacy supply contracts
- Major pharmaceutical distributors handling sterile injectables
- Direct-to-account fulfillment programs by brand owner partners
(Distributor identity is an operational procurement variable and depends on the institution’s contract landscape.)
How does Zosyn plastic-container supply compare with vials or alternative formulations?
Answer: Plastic-container sterile supply can diverge from vial-based presentations due to different container-closure systems, packaging line constraints, and supply chain dependencies (including container system sourcing and qualification).
Practical differences
- Plastic bags depend on bag/closure supplier availability and sterilized filling-line throughput.
- Vials depend on glass/closure supply, sterilization capacity, and different filling constraints.
What patent or regulatory constraints affect suppliers of Zosyn in plastic containers?
Answer: Zosyn is a small-molecule antibiotic brand with an established manufacturing and regulatory framework under its NDA. Supplier eligibility is governed by:
- FDA approval for manufacturing and packaging sites
- cGMP compliance and sterile manufacturing validation
- NDA/BLA manufacturing authorization for the specific finished dosage form
Does the container format create unique compliance requirements?
Yes. Even when active ingredient and strength are unchanged, the FDA-approved container-closure system drives:
- stability and compatibility requirements
- leachables and extractables assessment
- microbiological sterility assurance validation
Key Takeaways
- Brand supplier: Pfizer is the commercial supplier and label holder for Zosyn in the US.
- Plastic-container manufacturing: The finished plastic-container presentation is produced by Pfizer-approved manufacturing and packaging sites (including qualified contractors), NDC-specific.
- Container-closure providers: Container-closure system suppliers provide the bag and closure components used in the qualified administration system; the named entity depends on NDC-specific label/manufacturing/packaging statements.
- Procurement action: Identify the exact NDC for the plastic-container SKU to determine the listed manufacturer/packager for that presentation.
FAQs
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How do I confirm which plant makes Zosyn plastic-container units?
Use the NDC-specific FDA label “Manufactured by” and “Packaged by” statements for that presentation.
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Do different Zosyn plastic-container NDCs come from different manufacturers?
Yes. Manufacturing site and packaging line assignments can vary by NDC even with the same active ingredient and strength.
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Is the plastic bag supplier the same across all Pfizer sterile injectables?
Not necessarily. The container-closure system is qualified for each specific product presentation and can vary.
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What drives shortages for Zosyn plastic-container SKUs?
Sterile filling-line capacity, qualified packaging availability, and container-closure component supply for that specific presentation.
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Can a distributor change the manufacturer of Zosyn plastic containers?
No. Distributors move product; the manufacturer is determined by the approved NDA manufacturing/packaging assignments for the NDC lot.
References
(No direct sources were provided in the prompt; no citations are included.)
