The purpose of this study is to see how well antibiotics work in reducing chronic fatigue symptoms, such as tiredness, in patients that were treated for Lyme Disease. Fatigue is a common symptom of Lyme Disease. When fatigue does not improve after treatment, patients are considered to have Post Lyme Syndrome (PLS). The chronic fatigue seen in these patients appears to be related to the initial infection which causes Lyme Disease. It is believed, but not proven, that treatment with antibiotics may be effective in relieving chronic fatigue in PLS patients.