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Ampyra
Fampiridine
$4194.00
10mg · 3 × 56 tablets · 3 months supply
BrandBranded medicine· By Medisson
$1398.00 per month
How long a supply?
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Annual cost
$18174a year at this pack size
Prescription required
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About Ampyra
Overview
Ampyra is an extended-release tablet containing dalfampridine. It is used to improve walking in adults with multiple sclerosis (MS), with benefit demonstrated by increased walking speed. It blocks potassium channels, which may help signals travel along damaged nerves, although exactly how it produces its treatment effect is not fully understood.
What it treats
To improve walking in adults with multiple sclerosis (MS), demonstrated by increased walking speed.
Safety information
Side effects
Common side effects include urinary tract infections, trouble sleeping, dizziness, headache, nausea, weakness, back pain, balance problems, multiple sclerosis relapse, tingling or prickling sensations, nose and throat inflammation, constipation, indigestion, and throat pain. Ampyra can cause seizures and anaphylaxis, a serious allergic reaction. Seek immediate medical help if either occurs. Stop taking Ampyra and do not restart it if you have a seizure or anaphylaxis.
When to call your doctor
If symptoms are severe or getting worse quickly, seek emergency care rather than waiting.
Before taking this medicine
Do not take Ampyra if you have ever had a seizure, have moderate or severe kidney impairment (creatinine clearance of 50 mL/min or less), or have had an allergic reaction to Ampyra or 4-aminopyridine. Ampyra can cause seizures and anaphylaxis, a severe allergic reaction. If either occurs, stop taking Ampyra and do not restart it. Seizure risk increases with higher doses. Do not take it with other medicines containing 4-aminopyridine (also called 4-AP or fampridine), as the active ingredient is the same. Ampyra may harm an unborn baby, based on animal studies. Discuss use during pregnancy with your prescriber. Older adults are more likely to have reduced kidney function, so checking estimated creatinine clearance before starting treatment is particularly important.
Interactions
Tell your doctor if you take an OCT2 inhibitor. Taking one with Ampyra may increase the amount of Ampyra in your body and potentially increase the risk of seizures.
Using Ampyra
Dosing
Dosing is set by your prescriber. Each health care professional may prescribe medication differently according to a patient's medical history and condition, so follow the directions on your prescription label and speak to your doctor or pharmacist before changing anything.
Storage
Store below 25°C in a dry place, in the original pack, away from direct light and moisture. Do not keep it in a bathroom. Keep all medicines out of the sight and reach of children.
Clinical information on this page is summarised from the US FDA label AMPYRA (DALFAMPRIDINE) TABLET, FILM COATED, EXTENDED RELEASE [MERZ PHARMACEUTICALS, LLC] (DailyMed, retrieved 19 September 2026).
Patient information and references
Official and supporting information to read alongside advice from your prescriber or pharmacist.
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