Synthroid vs eltroxin. comparison synthroid tabs synthroid dosage and high cholesterol does synthroid suppress thyroglobulin taking synthroid and cytomel 100 mcg synthroid synthroid vs eltroxin . 05 mg, white, round. . . . that helps me like Old Synthroid did. I just recently switched from 125 mcg of Synthroid to 125 mcg of Eltroxin, and I've been experiencing some side effects -- slight tightness in chest and awareness of . S. . . . . . You might do better with Synthroid simply because . Synt... more