My father is 80 years old, 2 weeks ago, he was violently sick to his stomach for 2 days, naturally, he didn't have an appetite for a few days. Since this however, he has severe pain in his chest, can't lay back to sleep (he actually sleeps upright in a kitchen chair), and now his feet and legs are very swollen. He was prescribed 1000mg of Biaxin daily but it hasn't really improved anything. He refuses to go to the hospital butI am very concerned. Any thoughts?