Brushing teeth symptoms and conditions

My experience with Zocor was related to increased difficulty breathing; SOB was present with all exertion no matter how light. After awhile, I just stopped doing much of anything. The smallest exertion, such as getting ready for bed {brushing teeth, hair, washing face and putting on a night gown} invoked labored breathing and a pounding heart. After a week off the drug, the symptoms all by disappeared; now, 4 months later, I am up and around, walking longer walks and not short of breath. My problems may have been related to muscle weakness, but the heart is a muscle and the lungs function in conjunction with the heart.