Cipro® and other quinolones are contraindicated in which of the following conditions?

Bone and joint infections
Urinary tract infections
Myasthenia gravis
Upper respiratory infections

Myasthenia gravis

Rationale: Cipro® and other quinolones are contraindicated in myasthenia gravis. They are also contraindicated in patients younger than 18 years of age, or older than 60 years of age.