Saxenda

What is Saxenda?

Saxenda is Novo Nordisk’s once-daily liraglutide injection for chronic weight management — the first GLP-1 ever approved for weight loss, back in December 2014. It’s the elder statesman of the category: the drug that proved this class could carry a weight label, seven years before Wegovy and nine before Zepbound.

It’s approved for adults with a BMI of 30 or higher, or 27+ with at least one weight-related condition like high blood pressure — and, since December 2020, for adolescents aged 12–17 with obesity who weigh more than 132 lb. It comes as a prefilled multi-dose pen you inject once a day.

That “once a day” is the big practical difference. Every newer weight-loss injection is weekly; Saxenda is 365 shots a year instead of 52. Whether that matters to you — and whether the lower price of the 2024 generic offsets it — is most of the Saxenda decision.

How much weight can you lose on Saxenda?

About 8% of your body weight, on average — roughly 18 lb for the typical trial participant. In the 56-week SCALE Obesity and Prediabetes trial, adults on liraglutide 3 mg lost 8.0% versus 2.6% on placebo, and about 1 in 3 lost 10% or more.

Here’s the context every honest Saxenda page owes you: that’s roughly half of what weekly semaglutide achieves, and between a third and half of tirzepatide.

The shape of the curve differs too. Saxenda reaches its full 3 mg dose by week 5 — months faster than the weekly drugs — so results start sooner but plateau lower. And the label carries a built-in honesty checkpoint: if you haven’t lost at least 4% of your body weight after 16 weeks on the full dose, the guidance is to discontinue, because Saxenda is unlikely to deliver meaningful results for you.

As with everything in this class, the results last as long as the treatment does. Stop, and appetite — and most of the weight — comes back.

How does Saxenda work?

Liraglutide mimics GLP-1, a hormone your gut releases after a meal. Three effects do the work:

1. Quiets appetite signals in the brain, so you feel full sooner and think about food less.
2. Slows stomach emptying, so meals keep you satisfied for longer.
3. Steadies insulin response, smoothing the blood-sugar swings that drive hunger.

If that list looks identical to the one on our Wegovy page, it is — semaglutide runs the same playbook. The difference is engineering vintage: liraglutide’s half-life is about 13 hours, so it needs a daily injection to hold steady levels, while newer molecules were built to last a week and bind more effectively. Same mechanism, first-generation delivery — which is why the results are real but smaller. Where liraglutide sits in the family tree is covered in our GLP-1 overview.

What are the side effects of Saxenda?

The classic GLP-1 profile — mostly digestive, mostly front-loaded — with a daily-injection wrinkle. Because the dose steps up every week instead of every month, side effects tend to arrive faster than on the weekly drugs; the flip side is that you reach a stable dose, and usually a settled stomach, faster too. Nausea led the SCALE trial at roughly 39% and is the main reason people quit.

Mitigation is the standard playbook: smaller meals, easy on fat and alcohol around dose increases, plenty of water, and ask your prescriber to hold a titration step longer if a jump hits hard. Two things that shouldn’t wait for your next appointment: a racing or pounding heart (the label flags increased resting heart rate) and severe abdominal pain that won’t go away.

Saxenda dosage: schedule and strengths

Everyone starts at 0.6 mg once daily and steps up by 0.6 mg each week — full maintenance dose in about a month, the quickest ramp of any weight-loss GLP-1 (Wegovy takes around 17 weeks). That speed is the flip side of daily dosing: side effects come at you sooner, but so does the therapeutic dose. Per the FDA label:

Missed a day? Take your usual dose the next day — never double up. If more than 3 days go by, the label says to restart at 0.6 mg and re-titrate, which spares you a nausea ambush at full strength.

How do you use the Saxenda pen?

Saxenda comes in a multi-dose dial pen — a more manual device than the newer auto-injectors. You attach a fresh needle each day, dial your dose, and inject. One pen holds 18 mg, so at the full 3 mg dose a pen lasts six days — about five pens a month.

1. Attach a new needle (sold separately — NovoFine or similar) and remove both caps.
2. Before the first use of each new pen, do the one-time flow check: dial to the flow-check symbol and press until a drop appears at the tip.
3. Turn the dial to your prescribed dose.
4. Inject into your stomach (2 inches from the navel), front of thigh, or back of upper arm — press the button and count to 6 before withdrawing. Rotate spots daily.
5. Remove the needle into a sharps container and recap the pen. Never store it with a needle attached.

Storage: unused pens live in the refrigerator at 36–46°F. The pen you’re using can stay at room temperature below 86°F or in the fridge — either way, discard it 30 days after first use. Any time of day works, with or without food; consistency matters more than the clock.

How much does Saxenda cost?

List price is about $1,350 a month — the highest sticker in the weight-loss GLP-1 aisle, attached to the lowest average results. That’s the bad news. The good news is that Saxenda is the only drug on this site where the word generic applies: generic liraglutide 3 mg launched in 2024, and it frequently makes liraglutide the cheapest way to get a real, FDA-approved GLP-1. Figures below are drafts pending verification — always confirm current pricing.

One warning on the math: at the full dose you’ll go through about five pens a month, and some pharmacies quote per-pen prices that look deceptively small. Always compare monthly totals — brand, generic, and any savings offer — before deciding this is the budget option.

Saxenda vs Wegovy, Zepbound, and Victoza

On efficacy alone, this isn’t a debate — the newer weekly drugs win, and the head-to-head data says so directly. In STEP 8, weekly semaglutide more than doubled daily liraglutide’s average weight loss. So the real question is when Saxenda still makes sense in 2026. Four honest scenarios:

• Price. Generic liraglutide 3 mg can undercut every branded GLP-1 — sometimes dramatically.
• Age. Approved for adolescents 12–17 since 2020; among weight-loss GLP-1s, only Wegovy has matched that.
• Coverage. Some insurance formularies still cover liraglutide while excluding the newer, pricier drugs.
• Exit speed. The short half-life cuts both ways — if side effects hit, the drug clears in days rather than weeks.

How to get Saxenda

Saxenda is prescription-only — and unlike semaglutide and tirzepatide, there’s no meaningful compounded-liraglutide market to navigate around. The legitimate paths are the classic three: your own doctor, a telehealth visit, or a pharmacy fill, where it’s worth explicitly asking the pharmacist to price the generic. Anything sold as “Saxenda, no prescription needed” isn’t Saxenda.