I have found my body responds best to the brand name Synthroid after having been on Levothyroxin for years. My TSH levels were always fluctuating. I had to see my doctor every 4 months and have my TSH levels checked. If my levels changed and my medication had to be adjusted, I would have to see my doctor every 2 months. This was causing additional expense to our budget (deductables) and insurance company. My problem is that our insurance provider (Medco Health) says this is a non-preferred drug. As such, I would have to pay more than our usual $25 deductable per 90 day fill with the plan only covering a small amount. I have writen and online inquirey stating my case. Medco responded with "If you would like to request an appeal, please write to the following address." I would like to request an appeal, but would like some feedback from professionals who belive as I do that some people respond better to Synthroid than to generic and why. I would like to include this in my appeal. Maybe state some statistical data. Can anyone make suggestions?