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You feel Saxenda (liraglutide) working within a week; you see it on the scale by week 3-4; the real results come after the maintenance dose around week 16-20. The early doses are sub-therapeutic by design — here is the honest week-by-week, and why slow at first is normal.
Daily injection at 0.6 mg. Subtle appetite changes.
Daily titration: 0.6 → 1.2 → 1.8 → 2.4 → 3.0 mg by week 5. Nausea common at each step.
Maintenance 3.0 mg daily. Weight loss accelerates. SCALE cohort lost ~5% by week 12.
SCALE averaged 7-8% body weight loss at 6 months on 3.0 mg daily.
SCALE averaged ~8% at 56 weeks. Most weight loss occurs in first 6 months.
The middle stretch is where most of the doubt happens. Every 4 weeks your dose steps up, and each step usually brings two things at once: stronger appetite suppression and a temporary return of side effects (nausea, fatigue) for a few days while your body adjusts. Weight loss through this phase is stair-shaped, not linear — a good week after each increase, then a slower one. That pattern is the titration schedule working, not a stall. A real plateau is only meaningful once you have been at the full maintenance dose for 8-12 weeks.
You will usually feel Saxenda working — as reduced appetite and earlier fullness — within the first week or two of your first dose. Seeing it on the scale takes longer: measurable weight loss typically shows by week 3-4, and the larger loss comes only after you climb to the maintenance dose around week 16-20. This is by design. The starting dose is deliberately low to limit nausea, so it is sub-therapeutic for weight loss — "not much is happening" at week two is the plan working, not the drug failing.
The appetite effect begins fast, often within a few days of the first dose, because the drug reaches the receptors that slow gastric emptying and signal fullness almost immediately. What builds slowly is the dose, not the mechanism: each titration step raises the effect, which is why appetite suppression that feels mild in week one is much stronger by the time you reach maintenance.
Less than the headlines suggest, and that is normal. Month one is spent on the lowest dose, so a few pounds is a typical and healthy result — not the 15-21% figures from the trials, which are averages at 15-18 months on the full maintenance dose. If you have lost a little and your appetite is down, it is working exactly as expected. If you have lost nothing at all after a full month, that is worth raising with your prescriber, but it is usually a dose-timing question, not a sign the drug is wrong for you.
First check the two usual explanations: you are probably still one or two titration steps below the studied maintenance dose (weeks 5-16 are the climb, and the appetite effect strengthens with each step), and week-to-week scale noise of 1-2 lb can mask a real trend — compare 2-week averages instead. If your appetite is genuinely unchanged AND the 2-week average has not moved after two dose increases, bring it to your prescriber: options include confirming injection technique and site, ruling out medications that blunt weight loss, and discussing whether a different GLP-1 fits you better. Non-response to one drug does not predict non-response to another.
Editorial summary based on pivotal trial titration schedules and real-world reports. Individual timelines vary. Not medical advice.