I am a 43 yr old female and have recently developed high bp. I have been taking lisinopril 20 mg for about 1 1/2 months. I have not been able to sleep for the past few days, as my heart is racing and I have a constant feeling of anxiety. In addition, I am having trouble swallowing and my throat feels raw. I thought that the fever and aches I had last week were the flu, but after reading other similar stories, I will contact my doctor as soon as the office opens in the morning.