A nurse is collecting data from a client who has a urinary tract infection and is taking ciprofloxacin. The client reports pain in her calf muscle. Which of the following statements should the nurse make?

A. "That reaction means your dose is too high. Cut the pill in half.": Calf pain is not related to dosing but may indicate tendon inflammation or rupture, a serious adverse effect of ciprofloxacin. Self-adjusting the dose is unsafe and could worsen the complication. B. "This is an allergic reaction. Take the medication with an antihistamine.": Tendon pain is not an allergic reaction and will not be relieved by antihistamines. Mislabeling the symptom could delay appropriate intervention and increase risk for tendon rupture. C. "Discontinue the medication. I will ask your provider for another antibiotic.": Ciprofloxacin can cause tendinitis or tendon rupture, particularly in older adults or those with renal impairment. Prompt discontinuation and provider notification are essential to prevent worsening injury and select an alternative antibiotic. D. "Continue to take the medication. Calf pain is a minor reaction that will resolve itself.": Ignoring calf pain can result in tendon rupture or long-term disability. The symptom is considered serious and requires immediate action rather than reassurance.