Trulicity® (dulaglutide) and insomnia

Insomnia in the Trulicity® documents

Neither the US label nor the EU summary lists insomnia; the US table needs a reaction in at least 5% of people and above placebo, and the EU table has no sleep entry. ^[1][3] The Canadian monograph counts every event reported by at least 1% during treatment, regardless of cause, and so includes insomnia, anxiety and palpitations. ^[4]

Trial figures and real-world reports

In the trials, about one extra person in two hundred on 1.5 mg reported insomnia compared with placebo, and people on 0.75 mg reported it slightly less often than on placebo. ^[4] Over longer studies, the 1.5 mg rate matched the comparators almost exactly. ^[4] On this evidence, the trials do not show dulaglutide causing sleep problems in any consistent way.

Real-world reporting tells a different story. A 2025 study of psychiatric adverse event reports in the US, Canadian and Australian databases found that dulaglutide was linked to more insomnia reports than expected in the US system, with a reporting odds ratio of 2.93, and to more reports of eating disorders. ^[5] Disproportionality analyses compare reporting patterns, not rates, and the authors call for further studies, so this is a signal to investigate rather than evidence that dulaglutide causes insomnia. ^[5]

Label effects that can keep you awake

• Reflux and indigestion: gastro-oesophageal reflux was reported by 1.7% on 0.75 mg and 2.0% on 1.5 mg against 0.5% on placebo, and indigestion by 4.1% and 5.8% against 2.3%. ^[1] Lying flat can make these more noticeable.
• A faster heartbeat: average heart rate rose by 2 to 4 beats per minute, and sinus tachycardia was reported in 5.6% on 1.5 mg against 3.0% on placebo. ^[1] The Canadian monograph advises caution in people with heart rhythm problems. ^[4]
• Night-time low blood sugar: with insulin or a sulfonylurea, low readings were common, and MedlinePlus lists trouble sleeping, sweating and a pounding heartbeat among the symptoms. ^[1][10]
• Stomach upset at night: nausea, vomiting and diarrhoea peak in the first two weeks of treatment, according to the EU summary. ^[3] Waking with any of them breaks sleep.
• Injection timing: the label leaves the hour of the weekly injection and its relation to meals open, and nothing in it ties timing to sleep. ^[1]

Other things that disturb sleep

MedlinePlus separates short-term insomnia, often from stress, family pressure or a traumatic event, from chronic insomnia lasting a month or more, which is usually a symptom of something else: a medical condition, a medicine, another sleep disorder, caffeine, tobacco or alcohol. ^[7] Women, older adults, people under stress or with low mood, night or shift workers and people with an inactive lifestyle are at higher risk. ^[7]

Sleep apnoea is another common culprit. MedlinePlus describes breathing pauses during sleep, loud snoring and daytime drowsiness, with a higher risk in people who are overweight. ^[9] A 2026 health-records study found that people starting GLP-1 medicines, including dulaglutide, were less often diagnosed with new sleep apnoea than matched non-users over about three years; it was observational and cannot prove the medicines prevented it. ^[6]

What sleep guidance describes

MedlinePlus suggests writing worries in a journal before bed, keeping regular sleep and wake times, avoiding caffeine and alcohol in the evening, not eating heavy meals in the two hours before bed, avoiding activity that raises your heart rate in the two hours before sleep, and getting up for a quiet activity if you cannot fall asleep within 30 minutes. ^[8] It advises asking your provider how any medicines, herbs or supplements might affect your sleep, and contacting them if pain, discomfort or a medicine is keeping you awake. ^[8] For chronic insomnia, cognitive behavioural therapy can help. ^[7]

If you use insulin or a sulfonylurea, the label asks that you learn the signs of low blood sugar and how to treat them. ^[1] Before taking a sleep aid, the Medication Guide asks you to tell your provider about all medicines and supplements, including over-the-counter ones. ^[2]

Trulicity® is a registered trademark of Eli Lilly and Company. PepLabo is not affiliated with or endorsed by Eli Lilly and Company.

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