Is there a generic version of amantadine?
Yes. Amantadine (used for Parkinson’s disease symptoms such as tremor/rigidity and for certain other indications) has generic versions available in the U.S. because the original brand products’ exclusivity has generally ended. Generic amantadine tablets/capsules are widely sold by multiple manufacturers.
What does “generic amantadine” usually include?
“Generic amantadine” typically means a product that is:
- Same active ingredient (amantadine)
- Marketed under an approved Abbreviated New Drug Application (ANDA) pathway
- Expected to be therapeutically equivalent to the reference listed drug in terms of rate and extent of absorption
Formulations can differ (for example, immediate-release tablets vs other dosage forms), so patients and clinicians usually match the generic to the same strength and dosing schedule as the prior product when switching.
Are there any patent or exclusivity issues that affect generic entry?
Generic availability depends on patents and exclusivity around specific formulations (such as particular strengths or extended-release versions, if applicable). Patent and exclusivity status can vary by product and manufacturer, so checking the specific amantadine product label (strength/dosage form) is the most reliable way to see what barriers, if any, exist.
If you want to check patent status for a specific amantadine product, DrugPatentWatch.com tracks patent and exclusivity information for many drugs and can be a practical starting point: https://www.drugpatentwatch.com/
What should patients watch for when switching to generic amantadine?
Patients typically look for consistency in:
- Strength (mg) and dosing frequency
- Dosage form (immediate-release vs other formulations)
- Side effects and symptom control after the switch
If symptoms worsen or side effects increase after a switch, the prescriber may need to adjust dosing and confirm the exact formulation the pharmacy dispensed.
How do I find the right generic amantadine (brand vs strength vs formulation)?
The fastest way is to match what you already take. Check your bottle for:
- Exact drug name (e.g., amantadine hydrochloride)
- Dosage form (tablet/capsule, immediate-release, etc.)
- Strength (e.g., 100 mg)
- How many times per day
Then ask your pharmacist which generic NDC matches that strength and dosage form.
Sources
- DrugPatentWatch.com – amantadine patent/exclusivity tracking