high blood pressure
"I'm a 55 year old male and have been on Inderal since I was in my late 20's. This medicine was perfect for me with little side effects. Some light-headedness at times, nausea was probably the worst side-effect. Inderal has become expensive over the years and sometimes hard to find. After insurance company changes forced me to try other blood pressure drugs, I ended up back on Inderal. Now it seems it is not as effective as it was before. No one (Doctor, Cardiologist, etc.) seems to know why. Increase in palpitations, blood pressure rising, side effects have become worse, etc. Doctor put me on Bystolic. We'll see how it goes. 
LESSON: If a medicine works for you and you've been on it a long time, STAY ON IT. Don't let the insurance companies play with your health!"