Dalfampridine Side Effects

Medically reviewed by Drugs.com. Last updated on Feb 27, 2025.

Applies to dalfampridine: oral tablet extended release.

Precautions

It is very important that your doctor check your progress at regular visits to make sure that this medicine is working properly. Blood and urine tests may be needed to check for unwanted effects.

Check with your doctor right away if you have seizures while taking this medicine.

Do not take dalfampridine together with other aminopyridine medicines (eg, compounded 4-AP, fampridine). Taking these medicines together will increase the chance for more serious side effects.

This medicine may cause serious allergic reactions, including anaphylaxis, which can be life-threatening and require immediate medical attention. Tell your doctor right away if you have a rash, itching, hoarseness, trouble breathing, trouble swallowing, or any swelling of your hands, face, or mouth after using this medicine.

This medicine may make you dizzy, lightheaded, or feel a constant movement of self or surroundings. Do not drive or do anything else that could be dangerous until you know how this medicine affects you.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

Serious side effects of dalfampridine

Along with its needed effects, dalfampridine 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 while taking dalfampridine:

Get emergency help immediately if any of the following symptoms of overdose occur while taking dalfampridine:

Symptoms of overdose

• confusion
• increased sweating
• memory loss
• reduced awareness
• seizures
• weakness

Other side effects of dalfampridine

Some side effects of dalfampridine 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:

For healthcare professionals

Applies to dalfampridine: oral tablet extended release.

Nervous system adverse events

• Common (1% to 10%): Dizziness, headache, balance disorder, multiple sclerosis relapse, paresthesia, tremor
• Uncommon (0.1% to 1%): Seizure, exacerbation of trigeminal neuralgia^[Ref]

Gastrointestinal

• Common (1% to 10%): Nausea, constipation, dyspepsia
• Postmarketing reports: Vomiting^[Ref]

Musculoskeletal

• Common (1% to 10%): Back pain^[Ref]

Respiratory

• Common (1% to 10%): Nasopharyngitis, pharyngolaryngeal pain, dyspnea^[Ref]

Genitourinary

• Very common (10% or more): Urinary tract infection (12%)^[Ref]

Hypersensitivity

• Uncommon (0.1% to 1%): Anaphylaxis, angioedema, hypersensitivity^[Ref]

Psychiatric

• Common (1% to 10%): Insomnia, anxiety^[Ref]

Other

• Common (1% to 10%): Asthenia
• Uncommon (0.1% to 1%): Chest discomfort^[Ref]

Cardiovascular

• Common (1% to 10%): Palpitations^[Ref]

Dermatologic

• Uncommon (0.1% to 1%): Rash, urticaria^[Ref]

See also:

Further information

Dalfampridine side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer