Liraglutide 1.8 mg: Dosing Guide & What to Expect

The 1.8 mg dose of Liraglutide represents an important step in your treatment with this approved GLP-1 receptor agonist. Here is what clinical data and prescribing guidelines say about this specific dose.

What Is Liraglutide 1.8 mg?

Liraglutide (Victoza, Saxenda) is a GLP-1 receptor agonist administered by daily subcutaneous injection. The 1.8 mg dose is the week 12 titration dose in the standard titration protocol, designed to progressively increase receptor engagement and clinical efficacy.

Clinical trial data from SCALE demonstrates a mean weight loss of approximately 8.0% at the maximum dose (3.0 mg) in trial-eligible participants. Results at intermediate doses like 1.8 mg are typically lower.

Titration Schedule for Liraglutide

Patients typically remain at 1.8 mg for 4 weeks before escalating to Liraglutide 2.4 mg, assuming the dose is well tolerated.

Side Effects at 1.8 mg

The most commonly reported side effects of Liraglutide include GI-related symptoms that tend to be most pronounced during dose escalation. At 1.8 mg (a higher titration step), some patients experience more pronounced GI symptoms than at lower doses.

• •Nausea
• •Diarrhea
• •Constipation
• •Vomiting
• •Headache
• •Injection Site Reaction
• •Fatigue

Most side effects are transient and improve within 2–4 weeks at a stable dose. GI symptoms (nausea, diarrhea, constipation) are the most common reasons for dose reduction or discontinuation.

When to Call Your Doctor

• Persistent vomiting preventing adequate hydration
• Severe abdominal pain that does not resolve
• Signs of pancreatitis (severe upper abdominal pain radiating to back)
• Any signs of allergic reaction
• Heart rate increase of >20 bpm at rest that persists

When to Escalate from 1.8 mg

Standard protocol calls for 4 weeks at each dose level before escalation, provided the dose is well tolerated. If side effects are significant, your prescriber may recommend staying at 1.8 mg for an additional 4 weeks (an 8-week interval) before moving up.

Do not escalate doses without prescriber guidance. Self-directed dose escalation increases the risk of adverse events.

Contraindications & Safety

This medication is FDA-approved. Key contraindications include:

• Personal or family history of medullary thyroid carcinoma
• MEN type 2
• Hypersensitivity to liraglutide

Pregnancy: Not recommended. Discuss with your prescriber if pregnancy is a possibility.