On call. I am a 64-year-old man, quite healthy except for high blood pressure, which was diagnosed last year. My doctor gave me Hydro-Diuril, which was only partly successful. Then he added Prinivil, but I had to stop it because of a terrible cough. Now he wants me to take Lopressor, but I've read the package insert and I'm worried about side effects--especially sexual problems, since I already have problems in that area. Do I have to take the pills?