Dulaglutide
Also known as: Trulicity
Dulaglutide is a once-weekly GLP-1 receptor agonist fusion protein with extended half-life. It has proven cardiovascular benefits and significant weight loss effects with no dose titration required for many patients.
Research Status
FDA-approved for type 2 diabetes with cardiovascular risk
For research purposes only. Not approved for human use. Not medical advice.
Research Areas
Side Effects
Most common in the first 1–2 weeks; typically resolves with continued use. Occurs in 20–40% of users. Manage by eating small, frequent meals; avoiding fatty or greasy foods; and staying hydrated. Taking the injection in the evening may reduce daytime nausea.
Occurs in 5–10% of users, usually mild and transient. If persistent or severe, contact a healthcare provider to rule out other causes.
Reported in 15–25% of users; typically mild and self-resolving within 1–2 weeks. Ensure adequate hydration and fibre intake. Avoid high-fat meals which may worsen symptoms.
Occurs in 5–15% of users. Increase water intake, dietary fibre, and physical activity. Over-the-counter stool softeners may help if needed.
Erythema, bruising, or mild pain at injection site in 2–5% of users. Rotate injection sites systematically to minimise risk. Reactions typically resolve within 24–48 hours.
Reported in 5–10% of users. Usually mild and transient. Ensure adequate hydration and monitor for other causes.
Occurs in 5–8% of users, typically mild and temporary. Ensure adequate sleep and nutrition.
Expected pharmacological effect in 30–50% of users. This contributes to weight loss but requires attention to adequate caloric and nutrient intake, especially protein.
Risk is low when used alone (< 1%), but increases significantly when combined with insulin or sulphonylureas. Symptoms include tremor, sweating, palpitations, and confusion. Always carry fast-acting carbohydrates (glucose tablets, juice). Inform healthcare provider if hypoglycaemic episodes occur.
Reported in < 0.1% of users. Symptoms include severe abdominal pain, nausea, vomiting, and elevated pancreatic enzymes. Seek immediate medical attention if suspected. GLP-1 agonists are contraindicated in personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2.
Rapid weight loss may increase gallstone risk. Symptoms include right upper quadrant pain, nausea, and vomiting. Seek medical evaluation if suspected.
GI side effects (nausea, vomiting, diarrhoea) may lead to dehydration. Drink adequate fluids (at least 2–3 litres daily) and monitor for dizziness, dry mouth, or dark urine.
Reported in < 2% of users. Usually mild and transient. Monitor heart rate; inform healthcare provider if persistent or symptomatic.
Rapid glycaemic improvement may transiently worsen diabetic retinopathy in patients with pre-existing retinopathy. Inform your ophthalmologist of dulaglutide use. This is not a contraindication but requires monitoring.
Dosing Reference
| Parameter | Value |
|---|---|
| Dose range | 0.75-4.5 mg |
| Frequency | Once weekly |
| Timing | Same day/time each week |
| Route | Subcutaneous |
Proven CV benefits. No titration needed for many patients.
Research disclaimer
Figures drawn from published research literature and community logs. Not clinical recommendations. Consult a qualified professional. Research use only.
Reconstitution Guide
Do not use saline or bacteriostatic saline — use only bacteriostatic water for reconstitution
Do not shake the vial vigorously; gentle swirling prevents peptide degradation
Discard immediately if the solution appears cloudy, discolored, or contains visible particles
Use within 30 days of reconstitution when stored at 2–8°C
Do not freeze the reconstituted solution; freezing may denature the peptide
Use the PeptideVolt reconstitution calculator for your exact concentration
Molecular and Pharmacological Data
| Molecular weight | 65 kDa (approximately) |
| Half-life | 4.5 days |
Dulaglutide is a long-acting GLP-1 receptor agonist fusion protein that mimics glucagon-like peptide-1 (GLP-1), a natural hormone that regulates blood glucose and appetite. It binds to GLP-1 receptors on pancreatic beta cells to stimulate insulin secretion in response to elevated glucose, while simultaneously inhibiting glucagon secretion and slowing gastric emptying. The extended half-life (approximately 4.5 days) allows for once-weekly dosing and provides sustained metabolic effects including weight loss, improved glycaemic control, and cardiovascular protection.
Pancreatic Beta Cell Stimulation
GLP-1 receptor activation on beta cells increases glucose-dependent insulin secretion, reducing hyperglycaemia without causing hypoglycaemia when glucose is normal
Glucagon Suppression
Dulaglutide inhibits glucagon release from alpha cells, preventing inappropriate hepatic glucose production during fasting and fed states
Gastric Emptying Delay
Slowed stomach-to-intestine transit reduces postprandial glucose spikes and promotes satiety, contributing to weight loss
Central Appetite Regulation
GLP-1 receptor signalling in the hypothalamus and brainstem reduces hunger signals and increases feelings of fullness
Cardiovascular Protection
GLP-1 agonists reduce cardiovascular events through improved glycaemic control, blood pressure reduction, weight loss, and direct cardioprotective effects on myocardial and endothelial function
- Dulaglutide is a fusion protein combining human GLP-1 with human immunoglobulin G4 (IgG4) Fc domain, which extends half-life and allows once-weekly dosing
- It is glucose-dependent, meaning it only stimulates insulin when blood glucose is elevated, reducing hypoglycaemia risk
- Clinical trials (LEADER, SUSTAIN-6) demonstrate significant reductions in HbA1c (1.5–2.5%), body weight (2–4 kg), and cardiovascular events (26% reduction in major adverse cardiovascular events)
- No dose titration is required for most patients; the 0.75 mg starting dose can be increased directly to 1.5 mg after 1 week if needed
- Weight loss effects are sustained over 2–3 years with continued use
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