Amoxicillin / clavulanate
"This medicine was so bad. I gave it to my son for sinus infection. During 6 to 7 am he came to me and complained about stomach pain and then all of a  sudden he ran to the bathroom and threw up a lot 5 times. We found out about the side effects when we all woke up !! This all  happened and it was day one of medication. Please refer another medicine."