Approximately how many Americans are affected by overactive bladder?

• A. 10 million
• B. 40 million
• C. 100 million
• D. 1 million

Answer: (B)

Overactive bladder shows up in a lot of people. It’s defined by a strong, sudden urge to urinate, with or without leakage, and often includes frequent bathroom trips and sometimes trouble at night. Because of how common the symptoms are and because many people don’t report them, a sizable portion of adults experience OAB at some point. In the United States, this translates to tens of millions of people—not just a handful, but a large public-health-relevant number. That matches the option describing a large, multi‑million figure far better than the smaller or much larger estimates. Remember, estimates vary with how strictly OAB is defined and whether people seek care, but the take-home is that OAB affects a substantial number of Americans, hence the larger tens‑of‑millions range.