Saxenda doesn’t eliminate hunger for everyone, and there are several concrete reasons why you might still feel hungry while taking it. The most common culprits are dosage (you may not yet be at the full 3.0 mg maintenance dose), your body’s hormonal response to weight loss, how you’re storing the medication, and the difference between physical hunger and persistent food-related thoughts. Understanding which factor applies to you can help you figure out what to do next.
You May Not Be at the Full Dose Yet
Saxenda uses a five-week titration schedule, meaning you start at a low dose and gradually increase it. The FDA-approved schedule looks like this:
- Week 1: 0.6 mg daily
- Week 2: 1.2 mg daily
- Week 3: 1.8 mg daily
- Week 4: 2.4 mg daily
- Week 5 and beyond: 3.0 mg daily
The starting doses exist to let your body adjust and reduce nausea, not to suppress your appetite. If you’re in weeks one through four, feeling hungry is completely expected. The appetite-suppressing effects become more noticeable as you approach the 3.0 mg dose. Some people also find that even at the full dose, it takes an additional week or two before the hunger reduction feels significant.
Your Hunger Hormones Are Fighting Back
Saxenda works by mimicking a gut hormone called GLP-1, which signals fullness to your brain. But your body has its own counter-moves. Ghrelin, the primary hormone that drives hunger, is produced in the lining of your stomach, and research shows it increases during treatment with liraglutide (the active ingredient in Saxenda). One pilot study found that ghrelin levels were significantly elevated during treatment, which could diminish the weight-loss effects of the medication over time.
This makes biological sense. When you lose weight, your body interprets the energy deficit as a threat and ramps up hunger signaling. Saxenda suppresses some of that signaling, but rising ghrelin can partially override it. The result is that you feel less hungry than you would without the medication, but not as appetite-free as you expected. This hormonal tug-of-war is more pronounced the more weight you lose, which is why some people notice their hunger creeping back after an initial honeymoon period of easy appetite control.
Your Pen May Have Lost Potency
Saxenda is a biologic medication, and improper storage can quietly reduce how well it works. Once you start using a pen, it stays effective for 30 days at room temperature (between 59°F and 86°F). After 30 days, or if the pen has been exposed to temperatures above 86°F or below 36°F, the medication degrades.
This matters more than people realize. Leaving your pen in a hot car, on a sunny countertop, or in a checked bag during air travel can damage it without any visible change to the liquid inside. If your hunger suppression seemed to work initially and then stopped, check whether your current pen has been open for more than 30 days or exposed to temperature extremes. Unopened pens should be refrigerated between 36°F and 46°F until you’re ready to use them.
Food Noise vs. Physical Hunger
One of the less obvious reasons you might feel “hungry” on Saxenda is that what you’re experiencing isn’t physical hunger at all. There’s growing recognition of a phenomenon called food noise: persistent, intrusive thoughts about food. It sounds like a running mental loop of “When am I going to eat? What am I going to eat? Am I going to be full? Am I going to be hungry again?” It sits in the background of your mind and feels urgent, even when your stomach isn’t actually empty.
Saxenda does reduce food noise for many people, but not always completely. Charlotte Markey, a psychology professor and health sciences department chair at Rutgers University, has pointed out an important nuance: sometimes what feels like food noise is actually genuine hunger. If you’re restricting calories too aggressively while on Saxenda, that mental preoccupation with food could be your body legitimately telling you to eat more. The medication is meant to reduce appetite, not replace adequate nutrition.
A useful way to tell the difference: physical hunger builds gradually, centers in your stomach, and any food sounds appealing. Food noise is more mental, often fixates on specific foods, and persists even after you’ve eaten a reasonable meal.
Eating Patterns That Undermine the Medication
Saxenda slows how quickly food leaves your stomach, which is a key part of how it helps you feel full longer. But certain eating habits can work against this effect. Drinking your calories through smoothies, juices, or liquid meal replacements moves through your stomach faster than solid food, giving the medication less to work with. Similarly, eating very small meals spaced far apart can leave you in a cycle of feeling hungry, eating too little to trigger real fullness, and then feeling hungry again quickly.
Protein and fiber are your strongest allies here. Both slow digestion further, compounding the effect Saxenda already provides. A meal with 20 to 30 grams of protein and a serving of vegetables will keep you fuller, longer than the same number of calories from refined carbs. If you’re eating enough protein and still hungry, that’s useful information for your prescriber.
When the Medication Genuinely Isn’t Working
For some people, Saxenda simply doesn’t suppress appetite enough to produce meaningful results. Individual response varies widely based on genetics, metabolic factors, and how your brain responds to GLP-1 signaling. Clinical trials show that about a third of people on Saxenda don’t achieve the 5% weight loss threshold that indicates the drug is working for them.
The general guideline is to evaluate your progress after 16 weeks at the full 3.0 mg dose. If you haven’t lost at least 4% of your starting body weight by that point, continuing the medication is unlikely to produce better results. This doesn’t mean weight-loss medication won’t work for you. It means this particular one may not be the right fit. Other GLP-1 medications use different dosing strategies or combine GLP-1 with additional hormone pathways, and some people who don’t respond well to liraglutide respond much better to alternatives.
If you’re still in the titration phase, give the medication time. If you’re at the full dose and have ruled out storage issues, eating patterns, and unrealistic expectations about what “reduced hunger” feels like, that’s a conversation worth having with your prescriber sooner rather than later.