Gabitril and thryroid

I began taking gabitril several months ago to get off remeron which I took at night for sleep. It helped a bit but I felt drugged in the morning. I had gone up to 6 mg. Then last week, I made a mistake in meds and took 12 mgs during the afternoon thinking I was taking my thryroid pills which look just like the gabitril. I thought I was going to die. I became completely disoriented. I tried to look at a phone number to call someone but couldn't figure out how to do it. I coudn't rmember anything. My husband called from out of town and asked for our neighbors # and all I could do was give him my #. I couldn't talk. I just kept saying, huh? huh? He called the paramedics and they took me to the ER. It lasted about 4-5 hrs. Horrible. If you take it, make sure you start VERY low. It was a mistake I will NEVER make again. And I'm very careful about these things.