Yeah right I dont know what all these people are talking about ive takin mucinex plenty of times and im taking it right now with my antibiotic and it works great. Ive known plenty of people as well who have taken it and none of them have ever had side effects at all. 5 seizures is more than likely the cause of something other than mucinex unless you were trying to dose and get the psychedelic effect from taking more than prescribed.