I Read Where Benedryl And Tessalon Are A Bad Combination.

I read where benedryl and tessalon are a bad combination. I currently am taking atenolol because I have a rapid heart rate. It runs about 100bpm. I was diagnosed with walking pneumonia today. I haven't slept in a week because of a virus then pneumonia. Coughing has been unbelievable. They gave me an antibiotic and steroid shot today at about 2pm. I am so awake from the shot. Need advice.