Over the past year, I have walked with many folks through their journey to go on (or off of) a GLP-1 medication. The choice is made from many different directions and needs. Some are looking to shed a few pounds, some are looking to better manage blood pressure or various medical issues through weight loss, some are managing diabetes, and some are seeking a “quiet mind” without so much noise from various cravings. However, something strange is happening in my practice where people on GLP-1 medications are showing up in therapy describing a kind of emotional flatness that doesn’t look like depression. It actually looks like nothing and that’s the exact problem.
To clarify from the jump, I’m not a prescriber and I’m not telling anyone to stop their medication. But I am a therapist who sits across from people and I’m noticing a pattern that deserves some attention. The GLP-1 emotional side effects I’m seeing in my clients aren’t being talked about enough or as much as the physical side effects.
Apathy Versus Depression
Many people (understandably) get apathy and depression confused. Depression has a particular flavor. It’s damn heavy. It tells you stories about how worthless you are. It keeps you up at night or pins you to the bed. Apathy, on the other hand, is different. Apathy is a silent destroyer. It doesn’t argue with you. It just removes the volume knob from your entire emotional life.
One of my clients described it like this: “I’m not sad. I’m not happy. I just don’t care about things I used to care about. And the weird part is, I don’t care that I don’t care.” That last sentence is the red flag. When someone loses the ability to be bothered by their own numbness, something has shifted at a neurological level that goes beyond mood.
At our current understanding, it’s believed that GLP-1 receptor agonists like semaglutide and tirzepatide work on the brain’s reward and appetite circuits. They greatly reduce cravings. But those same circuits don’t just handle food. They handle motivation, pleasure, curiosity, and the emotional charge that makes you want to call your friend back, finish the project, or reach for your partner at night.
What This Looks Like in Relationships
Sometimes, partners notice before the person on the medication does. Someone starts Mounjaro or Ozempic, and within a few months their partner says something like, “I was in a really bad emotional state and you were totally unreachable.” The person on the medication doesn’t feel like anything is wrong, because feeling wrong requires caring, and the caring is exactly what’s been dialed down.
I’ve seen this create real ruptures. The non-medicated partner starts questioning the relationship. Am I boring? Are they falling out of love with me? Am I too much? Meanwhile the medicated partner genuinely can’t understand what the fuss is about. Both people are telling the truth and that’s what makes it so confusing.
I’ve also seen the medications affect sex. Desire isn’t just a body response. Desire is almost entirely about anticipation, about the reward your brain expects from closeness, pleasure, empowerment, etc. When that reward circuit gets dampened, the body might still function, but the wanting goes dormant. And in a culture that already struggles to talk about sexual desire, this often gets filed under “I’m just stressed” or “that’s just not where my head is at right now” and never examined any further.
Questions Worth Asking
If you’re on a GLP-1 and reading this (or connected with someone on this medication) with a flicker of recognition, here’s what I’d want you to consider. Not panic about. Just consider.
Has your motivation changed in ways that aren’t explained by your schedule? I don’t mean you’re tired after a long week. I’m talking about the thing that used to pull you out of bed on a Saturday morning just… doesn’t. Like you’ve lost your purpose or your “north star” went out.
Are you having fewer memories that feel emotionally charged? Some of my clients have described a strange experience where they know something happened, but they can’t access the feeling that went with it. This matters because memory encoding depends on emotional tagging. When emotions flatten, memory can get thinner too.
Has your exercise routine dropped off in a way that feels different from laziness? Dopamine is part of the motor circuit. When reward signaling changes, physical initiative can stall, not because your body is tired but because the neurological kick that says “go” isn’t firing the same way.
And the most important question: has someone close to you said something? Partners, friends, adult children who say “you seem different” are often picking up on something real. Take it seriously, even if you feel fine. Actually ESPECIALLY if you feel fine. This is the toughest self inquiry to make because we are often so happy with everything else that comes along with taking a GLP-1 that it’s easy to overlook the slow creep of apathy.
What to Do With This
Talk to your prescriber. Not to stop the medication, but to have an honest conversation about emotional side effects. Many prescribers are focused on metabolic outcomes and may not ask about your inner life. That doesn’t mean they don’t want to know. It means you might need to bring it up yourself.
Talk to your therapist. If you have one. If you don’t, find one who understands the intersection of medication and emotional life. A good therapist won’t tell you to stop your meds. They’ll help you figure out whether what you’re experiencing is a side effect, a pre-existing pattern, or some combination of both. That distinction matters more than most people realize.
Talk to your partner. If they’ve noticed changes, they need to know it might not be about the relationship. And you need to know that their concern isn’t criticism. It’s data.
The medication may be doing exactly what it’s supposed to do for your body. The question is whether it’s doing something to your emotional life that you haven’t consented to, because no one told you it was possible.
If this resonates, The PhilaTherapy Network works with individuals and relationships navigating the intersection of medication, relationships, and sexual health.
