urinary tract infection
"My daughter was taking this and the very first night she had horrible stomach pains.  I chalked that up to not having enough food in her stomach.  She ate more for her next dose and still had some nausea.  Then after just after taking 4 pills she felt like she was going to throw up, her heart beat skyrocketed, she got very dizzy and could barely breathe and has pain in her back."