Common side effects of Cipro include diarrhea, dizziness, drowsiness, headache, stomach upset, abdominal pain, nausea/vomiting, blurred vision, nervousness, anxiety, agitation, sleep problems (insomnia or nightmares), and rash.ipro (Ciprofloxacin) is a quinolone antibiotic. Cipro is available as a generic drug and is prescribed to treat infections of the skin, lungs, airways, bones, joints, and urinary tract infections caused by susceptible bacteria.