Gabapentin (neurontin) manufacturing plant cost?

“Gabapentin (Neurontin) manufacturing plant cost” doesn’t have one fixed number—cost varies massively based on:

• API vs finished dosage: making gabapentin active pharmaceutical ingredient (API) vs making tablets/capsules (finished dosage form)
• Scale (kg/month, tons/year)
• Quality/regulatory: cGMP/US FDA, EU GMP, DMF/ANDA readiness, etc.
• Facility type: new-build vs retrofit of an existing plant
• Equipment + containment: solvent handling, drying, milling, segregation, HVAC, etc.
• EHS/utility build-out: wastewater treatment, VOC control, etc.

That said, I can give you useful ranges.

Typical cost ranges (very rough)

1) Finished dosage plant (formulation + fill/finish)

If you mean a plant to make gabapentin tablets/capsules from purchased/contracted API:

• ~$5 million to $50+ million for a smaller to medium cGMP facility (sometimes higher depending on automation and capacity).

2) API manufacturing plant (making gabapentin API)

If you mean an API plant (chemical synthesis + crystallization + purification):

• ~$20 million to $150+ million for a mid-size to large cGMP chemical API facility.
• Complex projects with significant EHS/containment and new construction can exceed that.

3) Turnkey / “complete from scratch” project

If you mean “build and qualify everything” (engineering + construction + cGMP commissioning + validation/qualification):

• Often ~$100 million+ for a full new-build API operation at commercial scale.
• Smaller retrofit projects can be far less, depending on what already exists.

If you want a better estimate

Reply with:

1. Do you mean API or finished products (tablets/capsules)?
2. Target capacity: kg/month or tons/year?
3. Region/standard: US (FDA cGMP), EU, or other?
4. New build or retrofit?

…and I can narrow the range and outline the major cost drivers for that specific scenario.