Levothyroxine
"I've been on this medicine since I was 3 days old, I'm now 18. I couldn't imagine what I would do without it. I have missed my pill for 3 days before and I became very tired, cold and sweat a lot. It wasn't a fun time. Hearing your stories about how you lived without it sounds scary! Other then having very bad sleeping problems, this medicine is great. Never lost any hair and have healthy fingernails, etc."