Fampridine SR, a drug used to treat multiple sclerosis-related gait disturbances, contains the same active ingredient as 4-aminopyridine (or 4AP), a medication that MS patients have been purchasing from compounding pharmacies for many years. Fampridine SR differs from 4-aminopyridine in how it is released in the body. Because Fampridine SR is a sustained-release product (hence the SR in the name) it has an increased duration of effect and does not have to be dosed as often as compounded 4-aminopyridine.
Fampridine SR, a drug used to treat multiple sclerosis-related gait
disturbances, contains the same active ingredient as
4-aminopyridine (or 4AP), a medication that MS patients have been
purchasing from compounding pharmacies for many years....
More
Multiple Sclerosis Foundation answered:Fampridine SR, a drug used to treat multiple sclerosis-related gait disturbances, contains the same active ingredient as 4-aminopyridine (or 4AP), a medication that MS patients have been purchasing from compounding pharmacies for many years. Fampridine SR differs from 4-aminopyridine in how it is released in the body. Because Fampridine SR is a sustained-release product (hence the SR in the name) it has an increased duration of effect and does not have to be dosed as often as compounded 4-aminopyridine.Fampridine SR, a drug used to treat multiple sclerosis-related gait disturbances, contains the same active ingredient as 4-aminopyridine (or 4AP), a medication that MS patients have been purchasing from compounding pharmacies for many years.... More