Final answer:
Antibiotics are the medication used to treat repeated bouts of cystitis, a bacterial infection of the bladder with symptoms like pain during urination and the presence of blood or pus in the urine.
Step-by-step explanation:
The medication that treats repeated bouts of cystitis is antibiotics. Cystitis, often caused by a bacterial infection of the bladder, commonly presents with symptoms such as dysuria, pyuria, hematuria, and bladder pain. When treating cystitis, physicians typically prescribe antibiotics such as fluoroquinolones, nitrofurantoin, cephalosporins, or a combination of trimethoprim and sulfamethoxazole. These antibiotics are designed to eradicate the bacterial pathogen causing the infection, which is usually Escherichia coli, but can also include other bacteria. Effective treatment with antibiotics can prevent complications like sepsis or kidney infections, which are particularly pertinent concerns in elderly patients.