Losartan
"Took Losartan 50 mg for three days. I'm experiencing insomnia, diarrhea and stomach pain. I have heart palpitations, my face is flushed, I'm tremendously thirsty, and I feel "out of it." Plus, my blood pressure actually went up! Talked to my sister, who is sensitive to medications, too, and found out she's been on this drug for several years. Guess what? She's been experiencing some of the same "mysterious" symptoms, but her doctors haven't put two and two together. I'm discontinuing immediately."