My fiance just informed me that for the past couple days he has been going to the bathroom several times a day. He usually only goes a couple times at work but now he says he is running to urinate every half hour. He is still drinking the same amount of liquids as before so that can't be the reason. He also just finished a 2 week course of Biaxin for bronchitis.

Could it be the meds? Or his prostate? Any advice would be greatly appreciated. thanks :)

Frequent urination can also be a sign of a bladder infection (even without pain) but I would assume his problems are due to the 2-week course of Biaxin. This situation should get better over time. If it persists after another week or if he develops any other symptom, let the doctor know.