I have shortness of breath when I walk uphill or carry anything reasonably heavy. I have mild asthma and use one puff a day of synthroid. I also have a slightly stiff heart muscle. The medication for the synthroid was twice a day but I have been using it only once. My question is will my condition be aleviated if I use it twice. Other than that I am in excellent health I am also 86 years old stlll doing everything I did when I was younger. I can also remember what I did when I was younger?????