Enalapril
"I was taking Atenolol which wasn't working as well as it should but was keeping my Blood Pressure in somewhat reasonable range. Doctor switched me to Enalapril, hoping it would work better than the Atenolol. It didn't. Blood Pressure went up and stayed very high, pulse also went up and stayed high as well. Had some mild fainting spells as well. I'm sure it works for some people, but not for me."