I checked for side effects on the NIH website. I was having some serious itching and started to develop a rash. These were list under the heading "Some side effects can be serious. If you experience any of the following symptoms, call your doctor immediately: " I called on Friday and will probably get a call on Monday. I stop taking the meds Friday night and the good news is itching and rash are gone and the tiredness is gone. Bad news pain is much more intense. I'll call the neuro and see what we try next.