Common reasons to switch
- Insufficient weight loss: Less than 5% after 6 months at the therapeutic dose
- Intolerable side effects: Persistent nausea or GI issues that don't improve
- Cost: Switching to a more affordable option
- Medication discontinued: Saxenda patients switching to Wegovy or Mounjaro
- Better option available: Moving from an older medication to a more effective one
Common transition paths
| From | To | Restart escalation? | Notes |
|---|---|---|---|
| Ozempic | Wegovy | Continue from current dose level | Same ingredient — transition is straightforward |
| Saxenda | Wegovy | Yes — start from 0.25mg | Different molecules. Full escalation needed. |
| Wegovy | Mounjaro | Yes — start from 2.5mg | Different mechanism. May produce better results for non-responders. |
| Mounjaro | Wegovy | Yes — start from 0.25mg | Consider if Mounjaro side effects are intolerable. |
| Duromine | Any GLP-1 | Yes — full escalation | Common path after Duromine's 12-week limit. |
| Any tablet | Any GLP-1 | Yes — full escalation | Different mechanism entirely. |
The key rule: always restart escalation
Even if you were on a high dose of your previous medication, you must start the new medication at its lowest dose and follow the full escalation schedule. The one exception is switching between Ozempic and Wegovy (same molecule — your doctor may transition you directly to the equivalent dose level).
This means you'll experience another period of dose-related side effects. However, patients who've been on a GLP-1 before often find the second escalation easier than the first.
Timing your switch
- GLP-1 to GLP-1: Start the new medication the week after your last dose of the old one
- Duromine to GLP-1: Can start the GLP-1 immediately after your last Duromine dose
- Any switch: Discuss timing with your doctor — they may want a brief washout period
What to expect during the switch
You may experience a brief period (1–2 weeks) of increased appetite as the old medication wears off and before the new one takes full effect. This is normal and temporary. Some weight fluctuation during the transition is also normal — don't panic about the scale.