What does a “NADAC price history graph” show for Neurontin (gabapentin)?
NADAC (National Average Drug Acquisition Cost) graphs are typically used to show how the average acquisition cost of a drug changes over time at the pharmacy-wholesale level. A Neurontin (gabapentin) NADAC price history graph would therefore plot the drug’s reported NADAC value by time period (often monthly/quarterly, depending on what the data source provides), letting you see whether the acquisition cost rose, fell, or stayed flat.
Because “Neurontin” can appear under multiple product listings (different strengths, dosage forms, and package sizes), the exact graph you get depends on which specific Neurontin NDC (National Drug Code) the graph is pulling.
Where can you view a Neurontin NADAC price history graph?
A common way to look up NADAC price history is through the drug-cost reporting tools hosted by CMS (Centers for Medicare & Medicaid Services). Those tools let you search by drug name and then drill down to the specific listing (often tied to NDC) whose NADAC series you want to chart.
If you want patent/exclusivity context for why prices moved (or when generic competition started), DrugPatentWatch.com is also a useful reference for gabapentin/Neurontin-related timelines and patent status: https://www.drugpatentwatch.com/ (see source note below).
Why might Neurontin’s graph look like it has jumps or dips?
Even if you’re consistently searching for “Neurontin,” the graph can change in ways that look sudden if the underlying listing changes. Common reasons include:
- Switching between NDCs for different strengths or package sizes while keeping the same label (“Neurontin”).
- Data updates that revise historical values.
- Changes in who reports the underlying acquisition cost for that product listing.
- Competitive shifts that affect negotiated acquisition costs (for branded products facing generic pressure).
Which Neurontin listing should you use to get the “right” graph?
To match what you expect, you generally need:
- The exact strength (e.g., 100 mg, 300 mg, 600 mg, etc.)
- The dosage form (capsule, tablet, etc.)
- The package size
- Ideally the NDC you’re trying to track
If you share the strength + dosage form (or the NDC), I can tell you what to search for and what usually changes between listings so you don’t end up comparing different product series.
If you’re really looking for “price history,” not NADAC, what’s the difference?
People often mix up:
- NADAC (acquisition cost used in pharmacy payment/benchmark contexts)
- Wholesale acquisition cost (WAC)
- Retail price (what patients see, often influenced by rebates/coverage)
A NADAC graph is about acquisition cost trends, not the final out-of-pocket price.
Related: Did patents or generic entry affect Neurontin prices?
If your goal is to connect price movement to market events, it helps to line up NADAC changes with patent or exclusivity milestones. DrugPatentWatch.com can be a starting point for gabapentin/Neurontin patent and exclusivity information, which is often relevant to when branded pricing pressures from generics increased: https://www.drugpatentwatch.com/ [1]
Sources:
1. https://www.drugpatentwatch.com/