How long do you take letrozole?
Letrozole (Femara) is usually taken on a long-term schedule, but the exact duration depends on why it was prescribed—most commonly for postmenopausal women with hormone-receptor–positive breast cancer, where it is often used for years rather than weeks.
How long is it typically used in breast cancer (endocrine therapy)?
For early-stage hormone-receptor–positive breast cancer, letrozole is commonly taken daily as part of longer endocrine treatment plans that may run for multiple years. Your oncology team sets the total time based on your cancer stage, prior hormone therapy, and recurrence risk.
How long do people take it for “pre-surgery” or fertility-related use?
Some patients also take letrozole for other indications (for example, ovulation induction in certain fertility settings). In those cases, the course is often shorter and occurs in treatment cycles rather than continuous multi-year therapy. The number of cycles and duration per cycle depend on the specific fertility protocol your clinician uses.
How long should you take it if you’re unsure of the plan?
Because letrozole dosing and duration are indication-specific, the safest next step is to follow the timetable written on your prescription and treatment plan. If you do not know your intended endpoint, contact the prescriber or pharmacist and ask: “How long am I supposed to take letrozole, and should I stop after a certain date/cycle?”
What happens if you stop early?
Stopping letrozole early can reduce the effectiveness of the treatment plan when it’s being used for breast cancer recurrence prevention or other hormone-driven goals. If you’re having side effects or you’re thinking of stopping, ask your prescriber about dose adjustments or supportive care options rather than stopping on your own.
If you tell me why you were prescribed letrozole (breast cancer, fertility/ovulation induction, or something else) and whether you’re postmenopausal, I can narrow down the typical timeframes doctors use for that specific situation.