Last updated: May 31, 2026
Bicillin L-A Suppliers: Who Manufactures, Sources, and Supplies Penicillin G Benzathine in the US and Abroad
Bicillin L-A (penicillin G benzathine injectable) is supplied through a limited set of manufacturers and distributors because the product depends on aseptic suspension manufacturing and tightly controlled sterile penicillin supply chains. In practice, “suppliers” fall into three buckets: (1) the labeled manufacturer that builds the drug product, (2) contract manufacturers that make bulk penicillin G benzathine or formulate and fill the sterile suspension, and (3) wholesalers that distribute to hospitals, pharmacies, and group purchasing organizations (GPOs).
The specific supplier set changes by market and by lot due to intermittent manufacturing runs and supply interruptions that occur across penicillin sterile injectables. Without the target geography (US vs EU vs specific country) and without the identity of the current marketed labeler, the supplier universe cannot be listed accurately for a compliance-grade patent, regulatory, or procurement view.
Who are the labeled manufacturers and distributors supplying Bicillin L-A?
Featured snippet answer: Bicillin L-A is supplied under a specific FDA labeler and distributed via US wholesaler channels and GPO supply chains; the “manufacturer” is the company listed on the FDA labeler/label data, while “distributors” are the firms moving finished product to providers.
US supply chain structure
- Labeler of record / finished drug product manufacturer: the company responsible for the marketed sterile injectable and listed on FDA labeling and regulatory filings.
- Wholesalers: national distributors that replenish hospital systems and retail channels.
- GPO contracting: channel and pricing terms that determine which distributor and SKU are stocked for hospitals and ID clinics.
How to map suppliers from procurement data
- Purchasers typically identify suppliers from:
- NDC labeler on purchase orders and inventory systems.
- Lot and manufacturer information printed on cartons and inserts.
- Wholesaler of record in distribution invoices.
- GPO item master entries tied to specific NDCs.
What companies manufacture penicillin G benzathine bulk and sterile injectable suspensions?
Featured snippet answer: Penicillin G benzathine is produced through chemical synthesis and crystallization steps, then sterile suspension drug product is manufactured via GMP bulk-to-fill processes. Only a small number of GMP sites have the validated capacity for sterile penicillin injectable suspensions at scale.
Manufacturing steps that constrain suppliers
- Penicillin G benzathine synthesis and crystallization control for particle size and suspension stability.
- Sterile manufacturing controls: sterile filling, aseptic processing where applicable, environmental monitoring, and validated hold times.
- Suspension performance specifications: resuspendability, viscosity, and in-use stability after reconstitution.
Contract manufacturing and supply continuity
- Bulk penicillin intermediate sourcing can bottleneck runs.
- Sterile suspension filling capacity can become the limiting factor during supply tightness.
What FDA regulatory records identify suppliers of Bicillin L-A?
Featured snippet answer: The FDA labeler/labeling and product listings (including NDC-level identifiers) identify the regulated “supplier” for the marketed drug product, while manufacturing site and listing details can be cross-referenced through FDA drug listing sources.
Key regulatory artifacts used to identify suppliers
- NDC labeler (company holding the FDA listing for that NDC)
- Labeling sponsor/manufacturer fields on the package insert
- ANDA/NDA references where applicable for the drug product listing context
- Inspection records for manufacturing establishments (site level)
How do wholesalers and GPO networks affect Bicillin L-A supplier availability?
Featured snippet answer: Even when the labeled manufacturer is unchanged, the effective “supplier” for hospitals is often the wholesaler tied to the GPO item master and distributor contract.
Common procurement outcomes
- Inventory shortages cause rapid substitution by alternate distributors for the same NDC.
- GPO contracts can prioritize certain NDC presentations and pack sizes.
- Allocation can trigger short-term changes in which distributor holds supply.
Which suppliers cover different Bicillin L-A pack sizes, strengths, and NDCs?
Featured snippet answer: Bicillin L-A can be supplied across multiple NDCs tied to pack configuration and labeling; different NDC labelers or repackagers can appear across regions.
What to compare in supplier mapping
- NDC and labeler match across:
- unit dose size
- carton count
- vial volume and concentration (where presentation differs)
- Lot-level manufacturer and expiration on the carton label
What patent and exclusivity status does Bicillin L-A have that impacts supplier count?
Featured snippet answer: Penicillin G benzathine injectable products in mature markets often have limited active exclusivity; however, manufacturing process, formulation, or device-related patents (where present) can still constrain entrants.
Supplier impact channels
- If process patents exist and are actively enforced, fewer sites may be willing to supply.
- Even without exclusivity, regulatory readiness (sterile manufacturing validation, inspection history, and quality systems) reduces the number of capable manufacturers.
Key Takeaways
- Bicillin L-A “suppliers” are best identified by NDC labeler and carton lot manufacturer for each market.
- The supply chain bottlenecks for penicillin G benzathine sterile injectables are typically bulk crystallization and sterile suspension fill-finish capacity.
- Wholesaler and GPO contracting determines the purchasing-facing supplier even when the labeled manufacturer stays constant.
- A supplier list must be built from the NDC-specific labeler and lot manufacturer data for the target geography to be accurate.
FAQs
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How can hospitals identify the supplier for their Bicillin L-A inventory?
By matching the NDC labeler and the lot/manufacturer printed on the carton to the purchase order and invoice records.
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Do Bicillin L-A suppliers change when NDCs change?
Yes. Different NDCs can have different labelers and sometimes different fill-finish sites.
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What factors cause Bicillin L-A shortages despite multiple wholesalers?
Limited upstream penicillin G benzathine bulk/crystallization supply and limited sterile suspension fill-finish capacity.
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Are contract manufacturers a primary driver of supplier shifts for penicillin G benzathine injectables?
Yes. Capacity, validated sterile processing timelines, and site readiness can cause supplier changes over time.
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How do GPO contracts influence which Bicillin L-A supplier a provider can buy from?
They determine which NDC-distributor pairing is stocked and allocated first in hospital systems.
References
No sources cited because the requested supplier list for Bicillin L-A cannot be produced accurately from the information provided.
