The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
- Urinary tract infection (12%)
- Insomnia (trouble sleeping, 9%)
- Dizziness (7%)
- Headache (7%)
- Nausea (7%)
- Weakness or lack of energy (7%)
Less Common Side Effects
- Back pain
- Balance problems
- MS relapse
- Burning or prickling feeling in your hands and feet
- Runny nose or other common cold symptoms
- Constipation
- Upset stomach
Dalfampridine ER serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Severe allergic reactions: hives, rash, red skin, swelling of the lips or tongue, closing of the throat, difficulty breathing
- Seizures
Source: DailyMed
The following Dalfampridine ER side effects have also been reported
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
More common
Bladder pain
bloody or cloudy urine
difficult, burning, or painful urination
frequent urge to urinate
lower back or side pain
Less common
Blurred vision
burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
difficulty controlling your bladder or bowels
difficulty walking
feeling sad or depressed
forgetful
muscle cramps
problems with swallowing
slurred speech
unusual tiredness or weakness
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
Confusion
epileptic seizure that will not stop
increased sweating
memory loss
reduced awareness
seizures
weakness
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
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