Could you clarify the thermometer readings during these febrile episodes? Atorvastatin or
Lipitor has been known to cause
side effects such as unexplained muscle pain, weakness, fever, unusual tiredness, and loss of appetite. (ref: http://www.drugs.com/lipitor.html) While Atenolol can also cause fatigue, insomnia, nausea, memory loss, fever, numbness, tingling, cold extremities, and sore throat.( ref: http://www.medicinenet.com/atenolol/article.