Dalfampridine

Dalfampridine is used in the treatment of multiple sclerosis (MS). It helps to improve walking ability in people with multiple sclerosis. Dalfampridine must be taken in a dose and duration as per the prescription. It can be taken with or without food but make sure to take it at about the same time every day. An overdose of this medicine may have serious side effects on the body. The common side effects of this medicine are constipation, indigestion, urinary tract infection, sleeplessness, dizziness, headache, nausea, weakness, back pain, balance disorder, etc. If any of the side effects persist or bother you, consult the doctor immediately. Inform the doctor immediately if you experience any allergic reactions such as rash, shortness of breath, coughing, swelling, etc. Before taking this medicine, it is important to consult your doctor if you have any ongoing medication for any underlying disease. Pregnant and breastfeeding women must inform the doctor prior to the initiation of this treatment. During the treatment, your doctor may advise you for some laboratory tests to know the effects of the medicine in the body. Dalfampridine is a potassium channel blocker. It works by strengthening the communication between nerves and muscles. This results in improved muscle activity – in this case, walking – in people with multiple sclerosis.

• Multiple sclerosis (MS)

Mechanism not completely understood, but in animal studies shown to block potassium channels, to delay repolarization and to increase duration of action potentials in demyelinated axons Does not prolong QTc interval

Adult Dose: Multiple Sclerosis Indicated to improve walking in patients with multiple sclerosis by increasing walking speed 10 mg PO bid with or without food; take doses 12 hr apart Extended-release tablet; swallow tablet whole and do not chew, crush, divide, or dissolve tablets Hepatic impairment Not studied, but not expected to change dosing recommendations (primarily renal excretion) Child Dose: <18 years: Safety and efficacy not established Renal Dose: Renal impairment Moderate-to-severe (CrCl ?50 mL/min): Contraindicated due to increased risk of seizures Mild (CrCl 51-80 mL/min): Risk of seizure unknown, but plasma levels may be similar to levels of 15 mg PO bid, a dose that is possibly associated with increased seizure risk

Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Dalfampridine is to be taken empty stomach.

Common: • Urinary tract infection • Sleep disturbance • Dizziness • Headache • Nausea • Weakness • Back pain • Balance disorder (loss of balance) • Paresthesia (tingling or pricking sensation) • Throat irritation • Nasal irritation • Constipation • Indigestion • Throat pain

[CONSULT YOUR DOCTOR] It is not known whether Dalfampridine alters the ability to drive. Do not drive if you experience any symptoms that affect your ability to concentrate and react. Dalstep 10mg Tablet ER helps improve walking in adults with multiple sclerosis. It may take 2-6 weeks for the medicine to start working. Keep taking it as prescribed. Do not chew, cut, or crush the tablet as that may results in releasing too much medicine in your body at once. Inform your doctor if you have a history of seizures or kidney problems.

Hypersensitivity Moderate or severe renal impairment (CrCl ≤50 mL/min) History of seizure

[UNSAFE] Dalfampridine may cause excessive drowsiness with alcohol.

[CONSULT YOUR DOCTOR] Dalfampridine may be unsafe to use during pregnancy. Although there are limited studies in humans, animal studies have shown harmful effects on the developing baby. Your doctor will weigh the benefits and any potential risks before prescribing it to you. Please consult your doctor.

[CONSULT YOUR DOCTOR] Dalfampridine is probably unsafe to use during breastfeeding. Limited human data suggests that the drug may pass into the breastmilk and harm the baby.

[CONSULT YOUR DOCTOR] There is limited information available on the use of Dalfampridine in patients with kidney disease. Please consult your doctor. [CONSULT YOUR DOCTOR] There is limited information available on the use of Dalfampridine in patients with liver disease. Please consult your doctor.