The Peptide Nook

Dulaglutide

In plain English

Dulaglutide is a weekly GLP-1 medicine for type 2 diabetes. It lowers blood sugar, reduces appetite and lowers the risk of heart attack and stroke. It is an FDA-approved medicine.

What it's used for

  • Type 2 diabetes in adults and children 10 and up (approved)
  • Lowering heart attack and stroke risk in type 2 diabetes (approved)
  • Modest weight loss

Benefits

In human studies, dulaglutide lowered HbA1c by about 1–2 points and reduced major cardiovascular events by 12% (REWIND trial). Weight loss is modest, about 3–5 kg at higher doses.

How it works

In simple terms: dulaglutide is GLP-1 attached to a large antibody fragment, so it lasts a full week.

It activates GLP-1 receptors, boosting insulin release when blood sugar is high, lowering glucagon, slowing stomach emptying and reducing appetite. Its large size keeps the kidneys from clearing it quickly.

Development history

  • 2014: FDA approves Trulicity (Eli Lilly) for type 2 diabetes.
  • 2020: Higher 3 mg and 4.5 mg doses approved.

Typical protocols

Educational information only, not medical advice. The information below describes how this peptide has been used in research, on prescription labels or by users. It is not a recommendation. Talk to a qualified healthcare professional before starting, stopping or changing anything.

These doses follow the prescribing label.

Step Dose Frequency
Start 0.75 mg Weekly
Increase 1.5 mg, then 3 mg, then 4.5 mg, each after at least 4 weeks Weekly

Cycling

Used continuously.

Administration options

Subcutaneous injection once a week from a single-dose pen.

Preparation

Brand pens come ready to use and do not need mixing.

Side effects and safety

  • Common: nausea, vomiting, diarrhea, constipation and reduced appetite, mostly while the dose is being increased.
  • Rare but serious: pancreatitis, gallbladder problems and kidney strain from dehydration.
  • Not for people with a personal or family history of medullary thyroid cancer or MEN2.
  • Avoid during pregnancy and when trying to conceive.

Common stacks

Often prescribed with metformin or other diabetes medicines.

Storage

Refrigerate pens. Each pen can be kept at room temperature for up to 14 days.

Compare with

  • Semaglutide and tirzepatide: weekly and much stronger for weight loss.
  • Liraglutide: daily.

Frequently asked questions

Is dulaglutide used for weight loss?

It is approved for diabetes, not weight management. Weight loss happens but is smaller than with semaglutide or tirzepatide.

References

  1. Gerstein HC, et al. Dulaglutide and cardiovascular outcomes in type 2 diabetes (REWIND). Lancet. 2019;394(10193):121-130.
  2. Trulicity (dulaglutide) prescribing information. Eli Lilly.
Educational information only. Not medical advice. Always consult a qualified healthcare professional.

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