*This statement summarizes the third USPSTF recommendations for screening for chlamydial infection and the supporting scientific evidence, and it updates the 1995 recommendations contained in the Guide to Clinical Preventive Services, second edition (1).
What are the possible side effects of levothyroxine (Levothroid, Levoxyl, Synthroid, Tirosint, Unithroid)? Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat. Call your doctor at once if you have a serious side effect such as: headache;
Common Side Effects of Synthroid. Instances of Synthroid side effects are not particularly common, typically occurring in less than 1 percent of users. The most common of these include change in appetite, diarrhea, headache, leg cramps, and shortness of breath, vomiting or weight loss.ynthroid Side Effects. Synthroid is a synthetic hormone that is used to treat hypothyroidism by replacing the hormones that are not being produced due to a malfunctioning thyroid gland.