Does Saxenda make you tired?

Yes, and it is on the label rather than only in reports: fatigue appears among the common adverse reactions in Saxenda's FDA prescribing information, published 2026-06-15. Listed means it was seen often enough in the trials to be printed, not that it happens to everyone. Tiredness on these drugs usually has a simpler cause than the drug itself: eating far less. A sharp drop in intake means fewer calories, and often less fluid, less salt and less iron with them. The label lists fatigue as a side effect, but the common version of it is the deficit rather than the molecule. It clusters in the days after each dose increase. Saxenda steps up on a published schedule that reaches the maintenance dose at week 5. Most people see a few rough days after each step and a settling in between, not one long stretch. Once you are at 3 mg daily and no longer stepping up, the trigger stops recurring. What helps first: counting what you actually ate for three days. Appetite suppression is the point of the drug, and it is easy to fall well under what a body needs without noticing. It stops being ordinary at a specific line: fatigue with breathlessness, a racing heart or dizziness on standing. Those point at dehydration or anemia rather than at the drug settling in.