Hello, my son is 16 and has myocolonic seizure. His first seizure was last February and he had another one on Thursday. he has been on Keppra for 1 year and worked beautifully. I picked up a refill at CVS and he told me it tasted and smelled different. He didn't tell me this until the bottle was 1/2 empty. He told me that he felt he needed to see the doctor. I waited until the next morning to contact CVS however he had a seizure in his sleep. I got nervous and called ambulance. The doctor told me to raise the med to 750ml which I did. I went to CVS and they told me the new refill was from a different manufacturer. Did anyone ever experience this before. I feel CVS screwed me and that my son did not get his usual med. The pharmacist assured me that it's the same med with the same dosage. I don't believe him.....