Generic Synthroid

I was prescribed Synthroid many years ago.  At the time, my doctor informed not to take the generic form of Synthroid.  I recently switched pharmacists who prescribed a generic form, Levothyroxine.  After a few days of taking the medication, I noticed I had become extremely fatigued all day long and have also recently noticed irritability.  Could these symptoms be caused by taking the generic form of the medication?  

[peggy64]

Yes. My dr told me to take nothing but Synthroid. She signed that on the Rx.

[AR-10]

I agree with peggy.
Make the pharmacist give you Synthroid.