13 months of multi-site tendon pain & clicking/w no swelling (achilles worst) & muscle fatigue flares. sudden onset during levaquin (levofloxacin) rx. no notable muscle tenderness. can fibromyalgia diagnosis be ruled out?

No: Tender tear has been associated with levaquin (levofloxacin). However having the tendon and muscle pains 13 months after would be highly unlikely. I can even accept 1 or two sites being sprained or partially torn especially at the achilles but not at so many areas. I suggest that you consult a rheumatologist. I would like to hear other doctors' opinions as well.

Levaquin (levofloxacin): The pains that you are describing are side effects of levaquin (levofloxacin).

Probably not: Most likely this was an adverse reaction the the levaquin, (levofloxacin) not fibromyalgia. Are you still taking the Levaquin (levofloxacin) or another quinalone? There is no test for fibromyalgia, but physical findings may make the differential. Your doctor may be able to answer the question and to look for any other source of symptoms.