Where insomnia appears in the Saxenda® documents
The three regulators count side effects with different rules, yet all three list insomnia for adults. [1][2][3] That consistency is useful: it means the slightly higher rate on liraglutide was seen in the pooled trial data, not just in scattered reports.
| Document | Saxenda® | Placebo | Timing or note |
|---|---|---|---|
| US label, Table 2, adults [1] | 2.4% | 1.7% | Reactions in ≥2% and above placebo |
| Canadian monograph, Table 3, adults [3] | 80 of 3,384 (2.4%) | 33 of 1,941 (1.7%) | Mainly in the first 3 months |
| EU SmPC, Table 4 [2] | Common (≥1/100 to <1/10) | — | Mainly in the first 3 months |
| US label, Table 3, ages 12–17 [1] | Not listed | — | Threshold 3% |
Putting a 0.7-point gap in context
About one person in 140 more reported insomnia on Saxenda® than on placebo. Most people in the trials, on either treatment, did not report it. [1] Both groups received the same diet and activity counselling, so the comparison with placebo says more than the raw number does. [1]
The early timing fits the rest of the Saxenda® profile. Digestive reactions, fatigue and dizziness were also concentrated in the first weeks, while the dose climbed from 0.6 mg to 3 mg. [1][2]
What larger analyses found
A pooled analysis of the liraglutide 3 mg weight-management trials looked at psychiatric safety in 5,325 people. Rates of depression and anxiety reported as adverse events were similarly low on liraglutide and placebo, and depression questionnaire scores improved slightly in both groups. [5] Anxiety, which can interfere with sleep, appears in the US table at 2% versus 1.6%. [1]
A 2026 retrospective study using health records of more than 9,000 matched adolescents with obesity compared those starting semaglutide, liraglutide or tirzepatide with those on lifestyle treatment. Insomnia over up to three years did not differ significantly. [6] The study was observational and pooled three medicines, so it cannot isolate liraglutide.
Label effects that can cost a night’s sleep
- Faster heartbeat: the label reports higher resting heart rate on Saxenda® and wants palpitations, or a heart that races while you are resting, reported to your provider. [1] A pounding heart can be very noticeable in bed.
- Reflux and indigestion: gastro-oesophageal reflux was reported by 4.7% on Saxenda® versus 1.7% on placebo, and dyspepsia by 9.6% versus 2.7%. [1] Symptoms like these are often worse when lying down.
- Low blood sugar: in type 2 diabetes with insulin or a sulfonylurea, and in teenagers, low blood sugar was more frequent on Saxenda®. [1] MedlinePlus lists trouble sleeping among its symptoms. [10]
- Hunger and timing: Saxenda® reduces appetite, and the label lets you inject at any time of day, regardless of meals. [1] It does not link injection time to sleep.
Other reasons sleep goes wrong
MedlinePlus separates short-term insomnia, often from stress or a difficult event, from chronic insomnia, which goes on for at least a month and usually stems from something else: a medical condition, a medicine, caffeine, tobacco, alcohol or another sleep disorder. [7] Women, older adults, people under stress or with low mood, shift workers and people with an inactive lifestyle are at higher risk. [7]
Obstructive sleep apnoea is especially relevant. MedlinePlus notes that excess weight raises the risk, and that loud snoring, choking sounds and daytime drowsiness are typical. [9] The EU indication for Saxenda® lists sleep apnoea among qualifying weight-related conditions, and a 32-week trial in people with moderate or severe sleep apnoea found that liraglutide reduced its severity compared with placebo. [2] That does not make Saxenda® a sleep apnoea treatment, but it does mean poor sleep on Saxenda® may have nothing to do with the medicine.
What sleep guidance describes
MedlinePlus suggests writing down worries before bed, keeping regular sleep and wake times, keeping the bed for sleep only, skipping caffeine and alcohol later in the day, not eating heavy meals or doing heart-raising activity close to bedtime, and getting up for a quiet activity if sleep does not come. [8] It also advises asking your provider how any medicines, diet pills, herbs or supplements might affect your sleep. [8] For insomnia that lasts, counselling called cognitive behavioural therapy can help. [7]
The Saxenda® Medication Guide asks you to tell your provider about all medicines and supplements, including over-the-counter ones, which applies to sleep aids too. [1] The label allows the injection time to change without adjusting the dose, should you and your prescriber decide to try a different time. [1]
Saxenda® is a registered trademark of Novo Nordisk A/S. PepLabo is not affiliated with or endorsed by Novo Nordisk.
When to get help
| Sign | Who to contact | How fast | Source |
|---|---|---|---|
| Thoughts of suicide or of hurting yourself | Your local emergency number now; in the US you can also call or text 988 | Emergency | FDA [4] |
| Palpitations or a fast heartbeat while resting, lasting several minutes | Your prescriber | Today | Medication Guide [1] |
| Sweating at night, trembling or muddled thinking, if you take insulin or a sulfonylurea or are a teen on Saxenda® | Check blood sugar as instructed; contact your care team | Today | Medication Guide [1]; MedlinePlus [10] |
| Loud snoring, gasping in sleep or heavy daytime sleepiness | Your doctor | At your next appointment | MedlinePlus [9] |
| Low mood, or poor sleep that has gone on for a month or longer | Your doctor | At your next appointment | MedlinePlus [7][8] |
