Read the Medication Guide provided by your pharmacist before you start using dalfampridine and each time you get a refill. If you have any questions, ask your doctor or pharmacist.

Take this medication by mouth with or without food as directed by your doctor, usually twice a day. Swallow this medication whole. Do not crush, chew, or break this medication. Doing so can release all of the drug at once, increasing the risk of side effects. If you cannot swallow the tablets whole, talk with your doctor.

Dosage is based on your medical condition and response to treatment. To reduce the risks of side effects (such as seizures), do not take more medication or take it more often than prescribed. Your condition will not improve any faster and your risks of side effects will increase. Do not take more than 2 doses in a day. Take each dose 12 hours apart.

Use this medication regularly to get the most benefit from it. To help you remember, take it at the same times each day.

Tell your doctor if your condition lasts or gets worse.