Please tell us about your experiences with Synthroid and acne as a side effect.
If you are taking synthroid for a thyroid condition, there is a reasonable chance that adult acne can emerge as a side effect. By restoring your thyroid hormone balance, other mechanisms of your body can be thrown out of wack.
If this happens, follow type typical guidelines: a low carb diet, fasting, avoiding processed foods, and eating as many vegetables as you can get your hands on.