what are the side effects of tetracycline?
Tetracycline side effects Get emergency medical help if you have signs of an allergic reaction to tetracycline: hives; difficult breathing; swelling of your face, lips, tongue, or throat. Call your doctor at once if you have: 1  severe blistering, peeling, and red skin rash; 2  fever, chills, body aches, flu symptoms; 3  pale or yellowed skin, easy bruising or bleeding; 4  any signs of a new infection.