It is very common to require adjustments with thyroid medication. Your current medicine contains the active ingredient levothyroxine. Often, the symptoms you are experiencing are related to the dosage being slightly too high or too low, rather than the brand itself. While alternative generic formulations of levothyroxine are widely available from reputable manufacturers, switching brands can alter how your body absorbs the hormone. Please do not change medications on your own. I highly recommend consulting your doctor to get a simple thyroid blood test (TSH). This will help them safely adjust your dosage or transition you to an appropriate alternative generic option.