Levothyroxine
"I have been taking a generic levothyroxine for about one month. Prior to starting on the drug, I had multiple symptoms of an underactive thyroid that I never connected until my doctor did a routine screening based upon family history. My symptoms included extreme sensitivity to cold, blurry/burning eyes and even an incident of double-vision, inability to concentrate, lethargy, fatigue, lack of motivation, depression - the list goes on and on. Within TWO DAYS of starting this drug, I felt much better and my symptoms were much improved or gone all together. I have not had any side effects so far as I can tell, and I will have my blood checked in a couple of weeks to see if an adjustment in dosage is needed. This drug has changed my life."