Muscle weakness induced by PIZZA?

I was watching a commercial for Vytorin last night after having a difficult run that morning. I run marathons and train 3 times a week and had a great run on Thursday and was going out for a 12 miler which should have been a breeze and my legs felt like lead. I stopped at 3 1/2 and was disappointed but accepting until I was watching the commercial and it said some side effects can be brought on by food. It pictured Pizza as one of those foods. I had had pizza for dinner the night before the run and am wondering if anyone else has experienced anything like this? I have been taking Vytorin for over 2 years and as i said have run many marathons with it and can't recall any previous dierect link but have had some stomach distress as well a diahrea over time. I attributed them to ageing but am wondering now. My Cholestrol numbers are great and I've jsut had an angiogram that was completely clean and that is 14 years subsequent to a 100% blockage in my left coronary artery which is now completely clear! That is the good news and it certainly outways a bad morning run but I may need to be more careful of certain foods and you all can help me with that, Thanks mikeh 58 years of age!