What antibiotic is commonly prescribed for prophylaxis in recurring urinary tract infections?

The antibiotic sulfamethoxazole trimethoprim is frequently prescribed for prophylaxis in recurring urinary tract infections due to its effectiveness in preventing bacterial growth in the urinary tract. Administering it three times a week helps maintain a sufficient level of the antibiotic in the system to prevent infections without the risks associated with daily dosing. This intermittent dosing strategy minimizes the potential for antibiotic resistance while still providing protection against recurrent urinary tract infections.

While ciprofloxacin, nitrofurantoin, and amoxicillin may be used in certain contexts for urinary infections, they are not typically the first-line choice for prophylaxis. Ciprofloxacin has broader uses but is often reserved for more complicated cases due to concerns over side effects and resistance. Nitrofurantoin is primarily effective for treating current infections rather than for prophylaxis after intercourse. Amoxicillin can be used but is generally less effective than sulfamethoxazole trimethoprim for this specific scenario.