This site's own materials mention several different timeframes across different sections — worth reconciling them into one honest, realistic picture.
Urgency reduction is described as early as 1-2 weeks; fewer night trips by weeks 3-6; better flow by weeks 6-10; and the FAQ states most measurable flow and nocturia changes occur between weeks 4 and 12 — different symptoms on different timelines, not one single number.
Expecting every symptom to improve on the same schedule is the most common source of disappointment here — a realistic 4-to-12-week window, with early signs possible sooner, sets you up to judge it fairly.
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