Metoprolol
"Actually raised my heart rate from 70s to mid 80s to 100+ and did nothing for my blood pressure. Also gave me side effect of flashing lights at night in left eye. Wound up in ER after taking this drug for 3 months and LOST 14 pounds. Dr. Said impossible that this was due to metopropol, but as soon as I changed to Bystolic, heart rate decreased to 60s and 70s and weight stopped dropping. Guess I was allergic to it."