Key Takeaway
How to switch to liraglutide 1.8mg. Covers stepping up from 1.2mg, switching from Victoza to Saxenda at this dose, what the transition feels like, and pen supply considerations.
Switching to liraglutide 1.8mg is the third dose increase in the titration, moving up from 1.2mg after at least one week at that level. The increase is made by dialing the same pen to 1.8mg. This 50 percent increase is the largest remaining proportional step in the titration, making it the most significant transition you'll feel. Most patients handle it smoothly, but this is the dose where GI side effects are most likely to appear during the dose-escalation process.
Standard Titration: 1.2mg to 1.8mg
The move from 1.2mg to 1.8mg follows the standard weekly titration schedule. After seven days at 1.2mg, dial your pen to the 1.8mg mark on day 15 of treatment. liraglutide titration schedule
Readiness indicators before switching:
- At least 7 days completed at 1.2mg
- GI symptoms from the 1.2mg transition have resolved
- You're eating regular meals without distress
- No concerning symptoms that require evaluation
- Adequate pen supply for the higher dose (pens run out faster at 1.8mg)
If these criteria are met, proceed with the increase. If GI symptoms from 1.2mg are still present, consider an extra week before moving up. liraglutide 1.2mg how long to stay on
Why 1.8mg Is the important Step
The proportional increases throughout the titration show why 1.8mg is significant:
View data table
| Category | Mean Body Weight Loss (%) | Detail |
|---|---|---|
| Tirzepatide | 22 | ~22% body weight at 72 wks |
| Semaglutide | 15 | ~15% body weight at 68 wks |
| Liraglutide | 8 | ~8% body weight at 56 wks |
| Retatrutide | 24 | ~24% in Phase 2 trial |
| Transition | Proportional Increase |
|---|---|
| 0.6mg to 1.2mg | 100% (doubled) |
| 1.2mg to 1.8mg | 50% |
| 1.8mg to 2.4mg | 33% |
| 2.4mg to 3.0mg | 25% |
While the 0.6mg-to-1.2mg step is technically larger in percentage terms, the 1.2mg-to-1.8mg step brings you into truly therapeutic territory for the first time. The absolute amount of GLP-1 receptor activation at 1.8mg produces noticeable physiological effects that many patients did not feel at lower doses.
What the Switch Feels Like
Patient experiences during the transition from 1.2mg to 1.8mg:
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Try the BMI Calculator →- Appetite shift: The clearest change most patients notice. Hunger between meals diminishes noticeably. The drive to eat outside of planned meals weakens. This is the dose where many patients first describe feeling "in control" of their eating.
- GI adjustment: Approximately 20 to 30 percent of patients experience some nausea during the first 2 to 3 days. This is the most GI-eventful transition in the titration for most patients. It's usually manageable with diet adjustments.
- Satiety signals: Full feeling arrives earlier and lasts longer. Patients commonly report that they stop eating mid-meal because they genuinely feel satisfied, not because they're forcing themselves to stop.
- Mental clarity about food: The constant background hum of food thoughts, cravings, and planning begins to quiet. For patients who have struggled with food preoccupation, this is often the most valued change.
Liraglutide 1.8mg what to expect
Switching from Victoza 1.8mg to Saxenda
Patients already on Victoza at the maximum 1.8mg dose who want to switch to Saxenda for weight management have a straightforward path:
- You're already at 1.8mg, so no additional titration is needed at this level
- Your prescriber writes a Saxenda prescription starting at 1.8mg
- From there, increase to 2.4mg after one week, then 3.0mg the following week
- You reach the full Saxenda dose in just two additional weeks rather than five
This accelerated timeline is possible because your body is already fully adapted to liraglutide 1.8mg. compounded formulations of the active ingredient is in both products, so there's no cross-medication adjustment needed.
Insurance note: Even though the same drug is used, Victoza and Saxenda are different products with different coverage rules. Verify your plan's coverage for the Saxenda brand before making the switch. Contact provider for current pricing
Pen Supply Management at 1.8mg
At 1.8mg daily, each Saxenda pen (18mg total) lasts approximately 10 days. This is a notable change from the 0.6mg phase where a single pen lasted 30 days:
- A 5-pen box lasts approximately 50 days at 1.8mg
- As you continue titrating to 3.0mg, pens will last only about 6 days each
- Order refills proactively. Most pharmacies require 3 to 5 business days for specialty medications
- Running out of medication during the titration phase is particularly disruptive because it may require restarting from a lower dose
Contact provider for current pricing
Frequently Asked Questions
- Can I skip 1.8mg and go directly from 1.2mg to 2.4mg?
- This isn't recommended. The jump from 1.2mg to 2.4mg doubles the dose and significantly increases nausea and vomiting risk. The one-week stay at 1.8mg helps your body adapt to the intermediate level. Follow the prescribed titration.
- I felt nothing at 1.2mg. Will 1.8mg be different?
- Very likely. The 50 percent dose increase brings most patients into the perceptible range for appetite suppression. The 1.2mg dose is at the low end of therapeutic activity. At 1.8mg, the effect crosses a threshold that most patients can feel.
- Should I adjust my meal plan when switching to 1.8mg?
- Minor adjustments help. Slightly smaller portions, protein at every meal, and avoiding heavy or greasy foods for the first 2 to 3 days smooth the transition. You don't need a complete diet overhaul at this stage.
- What if 1.8mg gives me too many side effects?
- Options include staying at 1.8mg for an additional week to allow further adaptation, stepping back to 1.2mg for a week and then trying 1.8mg again, or discussing anti-nausea medication with your prescriber. Don't discontinue the medication without consulting your prescriber. liraglutide 1.8mg side effects
- Is 1.8mg a good maintenance dose for weight loss?
- For most patients, 1.8mg is sub-optimal for weight management. The full 3.0mg dose produces approximately twice the weight loss. But some patients achieve acceptable results at 1.8mg and prefer it for tolerability reasons. Discuss with your prescriber whether 1.8mg meets your goals. liraglutide 1.8mg results timeline