Underactive Thyroid
"I&#039;ve been on Synthroid (Levothyroxine) for about a year and a half now. They&#039;ve changed my dose 4 times so far and I&#039;m currently at 100 mcg.  Once they keep me on a dose for a bit, I feel okay, but with every change I have a few annoying side effects.  I can say that if you take it every day like you&#039;re supposed to, it will work eventually. You have to be patient, it won&#039;t make you feel great right away. It took me about 3 months.  But it helped with my lethargy, weight and even depression.  It&#039;s pretty good if you take as prescribed. If you stop taking it suddenly, the effects of hypothyroidism come back pretty quickly and severely so I recommend taking it as your doctor states."