Heart & blood pressure
Loop diuretic
Furosemide
Also known as: Lasix
Best time
Morning (second dose by early afternoon)
- 07:00–10:00· Main dose
- 12:00–14:00· Second dose, if prescribed
Take in the morning so the extra urine production happens during the day, not at night.
Strong evidence
Consistent clinical trials or official prescribing guidance support this timing.
Why this time works
Furosemide causes strong urine output for about 6 hours. Morning dosing avoids night-time bathroom trips that disturb sleep and increase fall risk. If twice daily, the second dose is usually taken no later than mid-afternoon.
Body rhythm involved
Kidney filtration and urine production normally fall at night.