This is my second day on Biaxin for pneumonia. It is horrible. I hate taking it. The taste in my mouth is horrible. The worst thing is not being able to sleep. I feel like I have taken an upper or something. My eyes won't shut and I watch the hours pass by. I don't feel tired at all and I know my body needs to rest to get better. The other thing that was really bad was the for about two hours after taking it I will sweat and feel hot and then I get the chills. It has happened with all four pills I have taken.