Does Ampyra (dalfampridine) cause side effects?
Ampyra (dalfampridine) is a potassium channel blocker used to treat multiple sclerosis (MS). Its exact mechanism of action is unknown, but it is known to block movement of potassium between nerve cells. In animal studies Ampyra increased the conduction of nerve signals.
Common side effects of Ampyra include
Serious side effects of Ampyra include
Symptoms of anaphylaxis include
Drug interactions have not been identified for Ampyra.
What are the important side effects of Ampyra (dalfampridine)?
The most common side effect of Ampyra is urinary tract infections.
Other common side effects include:
Serious side effects of Ampyra include:
People with a history of seizures should not use Ampyra.
Signs and symptoms of anaphylaxis include
Ampyra (dalfampridine) side effects list for healthcare professionals
The following serious adverse reactions are described in more detail elsewhere in the labeling:
Clinical Trials Experience
Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice.
In three placebo-controlled clinical trials of up to 14 weeks duration, 4% (15/400) of patients treated with Ampyra 10 mg twice daily experienced one or more adverse reactions leading to discontinuation, compared to 2% (5/238) of placebo-treated patients.
The adverse reactions leading to discontinuation of at least 2 patients treated with Ampyra and that led to discontinuation more frequently compared to placebo were
- headache (Ampyra 0.5%, placebo 0%),
- balance disorder (Ampyra 0.5%, placebo 0%),
- dizziness (Ampyra 0.5%, placebo 0%), and
- confusional state (Ampyra 0.3%, placebo 0%).
Table 1 lists adverse reactions that occurred in ≥2% of patients treated with Ampyra 10 mg twice daily, and more frequently than in placebo-treated patients, in controlled clinical trials.
Table 1: Adverse Reactions with an Incidence ≥2% of Ampyra-Treated Adult MS Patients and More Frequent with Ampyra Compared to Placebo in Controlled Clinical Trials
|Ampyra 10 mg twice daily|
|Urinary tract infection||8||12|
|Multiple sclerosis relapse||3||4|
Other Adverse Reactions
- Ampyra has been evaluated in a total of 1,952 subjects, including 917 MS patients.
- A total of 741 patients have been treated with Ampyra for over six months, 501 for over one year and 352 for over two years.
- The experience in open-label clinical trials is consistent with the safety profile observed in the placebo-controlled clinical trials.
- As in controlled clinical trials, a dose-dependent increase in the incidence of seizures has been observed in open-label clinical trials with Ampyra in patients with MS as follows:
- Ampyra 10 mg twice daily 0.41 per 100 person-years (95% confidence interval 0.13-0.96);
- dalfampridine 15 mg twice daily 1.7 per 100 person-years (95% confidence interval 0.21-6.28).
The following adverse event has been identified during post-marketing experience with dalfampridine. Because adverse events are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure: vomiting.
What drugs interact with Ampyra (dalfampridine)?
- Concurrent treatment with OCT2 inhibitors, such as cimetidine, may cause increased exposure to dalfampridine.
- Elevated levels of dalfampridine increase the risk of seizures.
- The potential benefits of taking OCT2 inhibitors concurrently with Ampyra should be considered against the risk of seizures in these patients.
- No interaction was identified between dalfampridine and baclofen.
Multimedia: Slideshows, Images & Quizzes
What Is Multiple Sclerosis? MS Symptoms, Causes, Diagnosis
MS is an autoimmune disease that attacks the nerves of the central nervous system. Learn about multiple sclerosis (MS) causes,...
What You Should Know About Multiple Sclerosis
Learn about celebrities, such as Montel Williams and Jack Osbourne, who are living with multiple sclerosis.
Multiple Sclerosis: Signs of Multiple Sclerosis Relapse
Signs of an MS relapse can vary in type and intensity. This WebMD slideshow lists some of the more common relapse symptoms.
Multiple Sclerosis: Making an MS Friendly Home
Adults with multiple sclerosis may be at risk for injuries, hazards, and falling at home. Some simple home modifications can...
Multiple Sclerosis (MS) Quiz: Test Your Medical IQ
Multiple Sclerosis is a debilitating neurological condition. Take the MS Quiz to test your knowledge of the causes, symptoms,...
Picture of Nerve Fibers and Myelin Attack in MS
In multiple sclerosis, an agent such as a virus or foreign antigen, in theory, may alter or interact with the immune system so...
Picture of Multiple Sclerosis Symptoms
Symptoms of multiple sclerosis may be single or multiple and may range from mild to severe in intensity and short to long in...
Related Disease Conditions
Multiple Sclerosis (MS)
Multiple sclerosis or MS is an autoimmune disorder in which brain and spinal cord nerve cells become demyelinated. This damage results in symptoms that may include numbness, weakness, vertigo, paralysis, and involuntary muscle contractions. Different forms of MS can follow variable courses from relatively benign to life-threatening. MS is treated with disease-modifying therapies. Some MS symptoms can be treated with medications.
MS (Multiple Sclerosis) vs. ALS (Amyotrophic Lateral Sclerosis) Differences and Similarities
ALS (amyotrophic lateral sclerosis, Lou Gehrig's disease) and MS (multiple sclerosis) are both diseases of the nervous system (neurodegenerative). ALS is a disease in which the nerve cells in the body are attacked by the immune system, although it's not considered an autoimmune disease by some scientists. MS is an autoimmune disease in which the insulated covering of the nerves (myelin sheath) in the CNS (central nervous system) degenerate, or deteriorate. Scientists don't know the exact cause of either problem. However, they have discovered that mutations in the gene that produces the SOD1 enzyme were associated with some cases of familial ALS. Scientists also theorize that multiple sclerosis may be caused by infection or vitamin D deficiency. ALS occurs between 50-70 years of age (the average age of occurrence ALS is 55), and mostly affects men. While MS occurs between 20-60 years of age, and mostly affects women. About 30,000 people in the US have ALS, and an average of 5,000 new diagnoses per year (that's about 15 new cases per week). Worldwide, MS affects more than 2.3 million people, with about 10,000 new cases diagnosed each year (that's about 200 new diagnoses per week).Some of the signs and symptoms of both diseases include muscle weakness, muscle spasms, problems walking, fatigue, slurred speech, and problems swallowing. ALS signs and symptoms that are different from MS include problems holding the head upright, clumsiness, muscle cramps and twitches, problems holding objects, and uncontrollable periods of laughing or crying. MS signs and symptoms that are different from ALS include vision problems, vertigo and balance problems, sexual problems, memory problems, depression, mood swings, and digestive problems. There is no cure for either disease, however the prognosis and life expectancy are different. Multiple sclerosis is not a fatal condition, while ALS progresses rapidly and leads to death.
Multiple Sclerosis (MS) Early Warning Signs and Types
Multiple sclerosis (MS) can be thought of as an immune-mediated inflammatory process involving different areas of the central nervous system (CNS) at various points in time. Early warning signs and symptoms of MS in children, teens, and adults are similar; however, children and teens with pediatric also may have seizures and a complete lack of energy. Adults with MS do not have these signs and symptoms. Other signs and symptoms of MS include inflammation of the optic nerve (optic neuritis), changes in vision, Wiping or having tissues around the eye and moving the eye may be painful, and double vision. There are four types of MS, relapsing remitting MS (RRMS), secondary progressive MS (SPMS), primary progressive MS (PPMS), and progressive relapsing MD (PRMS).
Multiple Sclerosis (MS) Symptoms and Treatments
Multiple sclerosis (MS) symptoms vary from person to person, and can last for days to months without periods of remission. Symptoms of MS include sexual problems and problems with the bowel, bladder, eyes, muscles, speech, swallowing, brain, and nervous system. The early symptoms and signs of multiple sclerosis usually start between age 20 and 40. MS in children, teens, and those over age 40 is rare. Treatment options for multiple sclerosis vary depending on the type and severity of symptoms. Medications may be prescribed to manage MS symptoms.
Is MS Contagious? (Multiple Sclerosis)
Multiple sclerosis, or MS, is a degenerative disease of the covering around the nerves in the central nervous system (CNS). Researchers and doctors don't know the exact cause, but many theorize that it may be due to environmental triggers, an autoimmune disease, and viruses (infections). Symptoms of MS include vision changes, paralysis, vertigo, heat intolerance, slurred speech, sexual dysfunction, and urinary incontinence (the inability to urinate). There's no vaccine or cure for MS, but the progression and symptoms of the disease can be treated.
Can Stress Cause Multiple Sclerosis (MS)?
Multiple sclerosis (MS) results when your immune system attacks the cells of the brain and spinal cord. It is an autoimmune disease, a condition in which the body’s immune system is misdirected and attacks its own cells. Stress can make it difficult for a person to manage MS symptoms. Regular exercise and mindful eating have been found to control the stress levels and overall health of people with MS.
Multiple Sclerosis (MS) and Pregnancy
Multiple sclerosis or MS is a central nervous system disease in which the immune system attacks the myelin sheath (the protective coating around nerves). Symptoms of MS include pain, sexual problems, fatigue, numbness and tingling, emotional changes, and depression.Women who are pregnant and have multiple sclerosis may have more difficulty carrying a pregnancy. Multiple sclerosis does not affect ability to conceive, and does not seem to affect fertility. MS symptoms during pregnancy may stay the same or get better; however, they may worsen after giving birth. Pregnancy decreases the number of relapses, but flares increase in the first 3-6 months after delivery. Pregnant women with MS may carrying a pregnancy more difficult to tell when labor starts, and there is an increased need to use forceps or vacuum to assist with delivery or b7 C-section (Cesarean birth) increases. Some treatment MS drugs may be safe to use during pregnancy; however, some drugs should not be taken, for example, baclofen (Gablofen, Lioresal), fluoxetine (Prozac, Sarafem), or solifenacin succinate (VESIcare), and most disease-modifying therapies (DMTs). Talk with your healthcare team about vitamins, supplements, and medications that you are taking if you are pregnant and have MS.
What Are the Very First Signs of Multiple Sclerosis?
Multiple sclerosis (MS) is an inflammatory, neurodegenerative, and autoimmune disease that affects the brain and spinal cord of the central nervous system (CNS). MS is one of the most common causes of non-injurious disability in young and middle-aged adults.
Early Signs of Multiple Sclerosis
Multiple sclerosis (MS) is a progressive disease of the brain and spinal cord (central nervous system). MS is an autoimmune disease; the body’s immune system mistakenly attacks the cells of the nervous system.
Alternative Treatment for MS (CAM for MS)
The term alternative therapy, in general, is used to describe any medical treatment or intervention that has not been scientifically documented or identified as safe or effective for a specific condition. Alternative therapy encompasses a variety of disciplines that range from diet and exercise to mental conditioning to lifestyle changes.
What Are the Early Signs of Multiple Sclerosis?
Multiple sclerosis is an autoimmune disease in which the immune system attacks the central nervous system (spinal cord and brain) by damaging and destroying the protective myelin sheath around the nerve fibers. Someone with multiple sclerosis might develop problems with muscle control, vision, bladder control and other body functions.
Treatment & Diagnosis
Medications & Supplements
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Professional side effects and drug interactions sections courtesy of the U.S. Food and Drug Administration.