I've become aware of some health issues concerning use of a family of broad spectrum antibiotics called fluoroquinolones. Of which Cipro (ciprofloxacin) and Levaquin (levofloxacin) are the most common. Basically they can cause damage to tendons, most prominently the achilles tendon apparently months or even years after taking them. Particularly if you are 60 or older. Key Points (from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4080593/): Tendinopathy can be a complication of treatment with fluoroquinolone antibiotics and usually is linked with 1 or more synergistic factors. Symptoms of fluoroquinolone-related tendinopathy can present within hours of starting treatment or up to 6 months after ceasing treatment, and recovery can be slower and require a less aggressive approach early in rehabilitation than for other types of tendinopathy. Treatment with fluoroquinolones should be discontinued and treatment with a nonquinolone antibiotic should be considered in patients who present with tendinopathy. Clinicians, athletes, athletic trainers, and medical support teams should be aware of and alert to the potential adverse effects of fluoroquinolones. Damage to the nerves in arms, hands, legs, or feet can happen in people taking fluoroquinolones. I became aware of this after being diagnosed with pneumonia upon returning from the Richmond NAC this year. It is extremely or nigh near impossible to correctly attribute causes months after you stop taking these medicines so I would personally recommend that those of us in the 60's particularly ask for an alternative medicine. The medical types seem to prescribe these almost as a reflex for certain illnesses as they've been around for a while. But the FDA warnings are getting stronger.