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Reye syndrome is a rare but very serious illness that causes brain swelling and liver damage. It can also affect all of the body’s organs.
Some people with epilepsy will have or eventually develop refractory epilepsy. This means that medicines don't work well, or at all, to control the seizures.
Relapsing-remitting multiple sclerosis (MS) is a type of multiple sclerosis that causes flare-ups with periods of remission in between. Most people diagnosed with MS start off with this type.