Liraglutide for Weight Loss
The first GLP-1 medication approved for weight management, now complemented by newer options.
Reviewed by GlobalGLP1 editorial team • Last reviewed March 2026 • Sources: FDA prescribing information, peer-reviewed clinical trials
Overview
Liraglutide is the active ingredient in Saxenda (for weight loss) and Victoza (for type 2 diabetes). It was the first GLP-1 medication approved for weight management back in 2014. Newer drugs like semaglutide and tirzepatide produce more weight loss on average, but liraglutide is still a solid option for people who prefer daily dosing over weekly shots, or who cannot tolerate the newer medications.
How Liraglutide Works
Like semaglutide, liraglutide copies a natural hunger hormone called GLP-1. It tells your brain you are full, slows digestion, and helps the pancreas release insulin after meals. The main difference is that it wears off faster (about 13 hours vs. 7 days for semaglutide), so you take it as a daily shot instead of weekly. Some people prefer this because they can adjust their timing day by day.
FDA Approval
Victoza
Type 2 diabetes mellitus
0.6 mg, 1.2 mg, 1.8 mg daily injection
Saxenda
Chronic weight management
0.6 mg to 3.0 mg daily injection (escalating dose)
How You Take It
The daily schedule means more shots than weekly options, but some people like the flexibility of choosing when to inject. The pen is pre-filled and easy to use.
How Much Weight You Can Lose
In the main weight loss trial, people on Saxenda 3.0 mg lost about 8% of their body weight over 56 weeks, compared to 2.6% with placebo. About one-third lost 10% or more. This is less than newer GLP-1s, but still meaningful, especially for people who cannot take semaglutide or tirzepatide.
Blood sugar effect: 0.8 to 1.1 points (Victoza, for diabetes)
Side Effects
Common Side Effects
- Nausea (about 39% of users in the SCALE trial; usually worst when starting and easing over the first month or two)
- Diarrhea (about 21% of users)
- Constipation (about 19% of users)
- Vomiting (about 16% of users; tends to drop off after the first few weeks)
- Low blood sugar (about 14% of users, mainly when combined with insulin or sulfonylurea diabetes medications)
- Decreased appetite (common; this is part of how the drug works)
- Headache (about 14% of users)
- Dizziness (uncommon)
Rare but Serious
- Pancreatitis
- Gallbladder disease
- Thyroid C-cell tumors (boxed warning)
- Increased heart rate
- Kidney problems
- Suicidal thoughts (rare, monitored)
Managing side effects: Stomach-related side effects are most common during the 5-week dose build-up and ease as your body adjusts. Taking the shot at the same time each day, eating smaller meals, and avoiding large or fatty foods help. Tell your provider if any side effect is persistent or severe. They can slow the dose increase to give you more time to adjust.
Liraglutide Cost & Savings (2026)
Savings programs: Novo Nordisk offers Saxenda savings cards for eligible patients. The NovoCare program provides assistance for uninsured patients.
Who Should Not Take Liraglutide
- Personal or family history of a type of thyroid cancer called medullary thyroid carcinoma
- A rare condition called Multiple Endocrine Neoplasia syndrome type 2
- Allergy to liraglutide or any ingredient in the medication
- Pregnancy (stop before trying to conceive)
- History of inflamed pancreas (pancreatitis)
Heart Health
The LEADER trial followed over 9,300 adults with type 2 diabetes and heart disease for about 4 years. People on liraglutide 1.8 mg (the diabetes dose) had 13% fewer major heart events and 22% fewer cardiovascular deaths compared to placebo.
What this means for you: Liraglutide was the first GLP-1 to show heart benefits, but this was proven at the diabetes dose (1.8 mg), not the weight loss dose (3.0 mg). The heart benefit for weight loss specifically has not been studied separately.
What to Expect, Month by Month
Mild appetite suppression begins. Effects are more gradual compared to semaglutide due to lower receptor binding affinity.
Reaching maintenance dose (3.0 mg) over 5 weeks. Early weight loss of 1-2% body weight during escalation.
Consistent loss of 0.5-1 lb per week. GI side effects typically resolved by this point.
Average 5-8% body weight lost. Some patients achieve 10%+. Blood sugar and blood pressure improvements measurable.
Weight loss stabilizes. Continued use needed to maintain results. Some patients see gradual additional loss through year 2.
Other Medications to Watch
Can cause dangerously low blood sugar when combined. Because liraglutide is taken daily, the interaction is more constant than with weekly drugs. Your doctor will reduce your insulin or sulfonylurea dose.
Liraglutide slows digestion, which can change how pills absorb. The effect is milder than with semaglutide because liraglutide wears off faster.
Your doctor should check your clotting levels (INR) when starting liraglutide. Dose adjustments may be needed during the first few weeks.
Liraglutide slows how fast Tylenol absorbs, but it still absorbs fully. For most people this does not matter.
Special Situations
Do not use during pregnancy. Stop at least 2 weeks before trying to conceive (shorter wait than semaglutide because liraglutide leaves your body faster).
Use with caution. No dose change needed, but nausea and vomiting can cause dehydration that worsens kidney function. Limited data in severe kidney disease.
Use with caution. Limited data. Not recommended for people with severe liver disease.
No dose change needed, but older adults may be more sensitive to side effects. The LEADER trial included people up to age 80.
Saxenda is FDA-approved for teens 12 and older who weigh at least 132 pounds (60 kg) and have obesity. The dose build-up follows the same schedule as adults.
What Happens If You Stop
Like other GLP-1 medications, weight regain is common after stopping Saxenda. In the SCALE maintenance study, people who stayed on liraglutide kept about 6% of their weight off, while people who switched to placebo regained it all over 56 weeks.
How to make stopping easier: Build healthy habits while on the medication so you have a foundation when you stop. If you plan to stay on a GLP-1 long-term, consider switching to a weekly option (Wegovy or Zepbound) since weekly shots are easier to stick with than daily. Continue working with a dietitian and exercise plan after stopping.
Liraglutide FAQs
Saxenda can still be appropriate for certain patients: those who prefer daily dosing, can't tolerate semaglutide or tirzepatide, or whose insurance covers Saxenda but not newer medications. Discuss all options with your healthcare provider.
Liraglutide (Saxenda) has a half-life of about 13 hours, while semaglutide (Ozempic/Wegovy) has a half-life of about 7 days. The longer half-life of semaglutide allows for once-weekly dosing.
Yes, switching from liraglutide to semaglutide is common and generally straightforward. Your doctor will typically stop Saxenda and start the semaglutide escalation schedule. No washout period is needed.
Clinical data shows semaglutide (Ozempic/Wegovy) produces significantly more weight loss than liraglutide (Saxenda). The STEP 8 trial directly compared the two and found semaglutide produced about twice the weight loss.
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Medical Disclaimer: This guide is for informational purposes only and is not medical advice. All clinical data is sourced from FDA prescribing information and published peer-reviewed trials. Individual results vary. Always consult a qualified healthcare provider before starting, stopping, or switching any medication.