Around week six on my GLP-1, I started wondering if something was wrong with me. Not the nausea everyone warns you about — that had mostly passed. This was different: a heavy, wading-through-water tiredness that showed up by early afternoon and did not care how well I had slept. I would sit down to read after lunch and wake up an hour later with the book on the floor.
When I finally mentioned it to a friend who had started the same medication, she laughed with relief and said she thought it was just her. It is not just her, and it is not just you. Eating dramatically less while your body adjusts to a new medication is genuinely tiring, especially for those of us past sixty-five.
The good news: mine improved, and most of the improvement came from five specific changes. Here they are, in the order they helped.
One: I stopped accidentally starving myself
The medication quiets your appetite so effectively that you can drift through a day on a slice of toast and a yogurt without noticing. That is not discipline — it is under-fueling, and fatigue is the bill. I started treating meals like appointments: three a day, on a schedule, whether or not I felt hungry. Small meals, but real ones, always with protein. Within two weeks, the afternoon wall moved from one o'clock to four o'clock.
Two: water, and then more water
I never used to think about hydration. But these medications slow your stomach, and it is easy to take in far less fluid than before without feeling it. Dehydration at 69 feels exactly like exhaustion. A big glass of water first thing, and a bottle I refill twice before dinner, made a real and slightly embarrassing difference — embarrassing because the fix was so simple.
Three: I had my levels checked
When the fatigue did not fully lift, I asked my doctor for blood work — iron, B12, vitamin D, thyroid. My vitamin D was low, which is common at my age even without a GLP-1. Correcting it took the edge off in a way I could feel within about six weeks. I am glad I did not just push through; low iron or thyroid trouble can masquerade as medication fatigue, and those deserve a doctor's eyes.
Four: a walk, even when the couch argued otherwise
This one felt backwards. How can spending energy give you energy? I do not know the biochemistry, but I know that a twenty-minute walk after lunch — the exact hour I most wanted to nap — reliably bought me a brighter afternoon. On days I skipped it, the fog rolled back in. It has become the least negotiable part of my day.
Five: I let the nap be a nap
Here is the one nobody expects: I stopped fighting it. A short rest — twenty minutes, in a chair, with a timer — left me restored instead of groggy. The hour-long accidental couch sleep was making things worse; the deliberate short one made things better. There is no prize for white-knuckling your way through an afternoon at our age.
When tiredness is more than tiredness
I want to say this plainly, because we are not twenty-five: fatigue that comes with dizziness, chest discomfort, shortness of breath, confusion, or that gets steadily worse instead of better is not a push-through situation. That is a call-your-doctor-today situation. Mine was the ordinary kind, and it still deserved attention — yours does too.
Fourteen months in, my energy is better than it was before I started the medication, because I am lighter, sleeping better, and eating with more intention than I have in decades. The fatigue was real. It was also, for me, a season with an end.
This is my personal experience, shared in the hope it helps you feel less alone in yours. It is not medical advice. GLP-1 medications affect everyone differently, so please talk with a doctor you trust about what's right for you.