I prescribe semaglutide. That surprises some patients when they first come to see me for back pain or knee pain. They expect injections, nerve blocks, maybe physical therapy. They don’t expect their pain management doctor to bring up weight loss medication.
But here’s what I’ve learned after years of treating chronic pain: for a significant number of my patients, the most impactful thing I can do is help them lose 15 to 20 pounds. Not because weight loss is a cure-all — it isn’t. Because excess weight is mechanically destroying their joints, compressing their discs, and driving inflammation that makes everything hurt more.
That’s why I want to explain how semaglutide works, what it actually feels like to take it, and why it’s become an important part of how I treat certain pain conditions.
The math is simple and brutal
Every extra pound of body weight puts roughly four pounds of force on your knees. If you’re 30 pounds overweight, your knees absorb an additional 120 pounds of stress with every step. Over thousands of steps a day, over months and years, that load grinds down cartilage, inflames joint capsules, and accelerates osteoarthritis.
The spine takes a beating too. Excess abdominal weight shifts your center of gravity forward, increasing the load on lumbar discs and facet joints. I see this pattern constantly — patients with disc herniations or sciatica who aren’t responding as well to treatment as they should, and when we look at the full picture, a significant part of the problem is mechanical overload from weight.
Losing even 10 to 15 pounds changes the equation. Patients who were getting 6 weeks of relief from a joint injection start getting 3 to 4 months. Patients who couldn’t tolerate a 20-minute walk start building up to 45 minutes. The downstream effects compound.
What semaglutide actually does
Semaglutide is a GLP-1 receptor agonist. In plain terms: it mimics a hormone your gut naturally produces after you eat. That hormone tells your brain you’re full, slows down how fast your stomach empties, and reduces the food noise — that constant background hum of thinking about your next meal.
What patients tell me most often is that it’s not willpower. They just stop being as hungry. They eat a normal portion and feel satisfied. The obsessive relationship with food quiets down.
Clinical trials showed average weight loss of about 15 percent of body weight over 68 weeks. For someone who weighs 220 pounds, that’s roughly 33 pounds. That’s not a number I throw out as a guarantee — individual results vary a lot — but it gives you an idea of the scale of what’s possible with this medication, which far exceeds what any previous non-surgical option could achieve.
What the first few months actually feel like
I’m upfront with patients about what to expect because I don’t want anyone blindsided.
Semaglutide is a weekly injection — a small subcutaneous shot, usually in the abdomen or thigh. You start at a low dose (0.25 mg per week) and increase gradually over 16 to 20 weeks. The slow titration is important. It gives your body time to adjust and it’s how we minimize side effects.
Weeks 1 through 4: Most patients notice mild appetite suppression. Some feel nothing yet. The most common side effect is nausea, usually mild, usually worst in the first few days after each injection. Eating smaller meals and avoiding greasy food helps. Some patients get constipation. We manage that proactively.
Months 2 through 3: This is when the dose increases start producing more noticeable appetite changes. Most patients lose 5 to 8 pounds in this window. Energy levels often improve because you’re eating less junk but still getting adequate nutrition. Some patients report that their pain is already slightly better, though it’s early.
Months 4 through 6: The weight loss becomes meaningful — typically 10 to 15 percent of the total you’ll lose over the full course. This is when I start seeing real changes in pain scores. Patients with knee osteoarthritis or lumbar disc issues often tell me they’re moving better, sleeping better, using less ibuprofen.
Month 6 and beyond: Weight loss continues but the rate slows. Most patients reach their maximum effect somewhere between 12 and 18 months. The goal isn’t to stay on the medication forever for everyone — though some patients do need longer-term treatment — it’s to get to a weight that changes the mechanical equation for your pain.
Side effects patients actually ask me about
Nausea is the big one. About 40 percent of patients experience some degree of nausea, mostly in the first 4 to 8 weeks and mostly mild. It typically fades as your body adjusts. Eating slowly, avoiding large meals, and staying hydrated all help.
Constipation and diarrhea both show up. Sounds contradictory, but the medication affects gastric motility differently in different people. Both are manageable.
Some patients worry about pancreatitis. The risk exists but is very low. I screen for risk factors before prescribing — history of pancreatitis, gallstones, heavy alcohol use — and monitor appropriately.
The question I get most often: “Will I gain it all back if I stop?” Honest answer — some patients do regain weight after stopping, especially if the underlying habits haven’t changed. That’s why I pair medication with real dietary changes and, when possible, increased physical activity. For my pain patients, the activity piece is particularly important because the weight loss itself often makes exercise possible in a way it wasn’t before.
Why this matters more for pain patients
Here’s something that doesn’t get discussed enough: chronic pain and weight gain feed each other.
Pain limits movement. Less movement means fewer calories burned and more muscle loss. Muscle loss reduces joint stability, which increases pain. Poor sleep from pain increases cortisol and ghrelin — hormones that drive appetite and fat storage. Pain medications, especially certain ones, can cause weight gain as a side effect.
It’s a cycle, and it’s vicious. I’ve watched patients get stuck in it for years. They come in, we treat the pain, they feel somewhat better but can’t lose weight because they still hurt too much to exercise consistently. Or they lose weight through extreme dieting, can’t sustain it, regain everything, and their pain comes back worse.
Semaglutide breaks the cycle from the weight side. It doesn’t require exercise to work — which matters enormously for someone who can barely walk around the block because of knee pain or a bad disc. The weight comes off, the mechanical load decreases, pain improves, and now exercise becomes possible. That’s when the real long-term gains happen.
Ozempic vs. Wegovy — quick clarification
Patients ask about this constantly so let me keep it simple. Ozempic and Wegovy are both semaglutide — same molecule. Ozempic is FDA-approved for type 2 diabetes. Wegovy is FDA-approved for weight management. The dosing is different (Wegovy goes up to 2.4 mg weekly; Ozempic tops out at 2 mg). Insurance coverage depends on which one and what your diagnosis is. We sort through all of this during the initial consultation.
Who should consider this
Not everyone is a candidate. Generally, semaglutide is appropriate if you have a BMI of 30 or higher, or a BMI of 27 or higher with a weight-related condition — and chronic pain absolutely counts.
I find it most valuable for patients where weight is clearly contributing to their pain but conventional approaches to weight loss haven’t worked. The patient with knee osteoarthritis who’s tried dieting three times. The patient with lumbar disc disease who can’t exercise enough to create a meaningful calorie deficit. The patient who’s about to have a joint replacement and would have better surgical outcomes at a lower weight.
If that sounds like you, it’s worth a conversation.
Getting started
I see patients for medical weight loss at Modal Pain Management in NYC. The first visit includes a full evaluation — not just weight and BMI, but how your weight is affecting your specific pain condition, what treatments you’re currently on, and whether semaglutide makes sense for your situation. Not every patient who walks in leaves with a prescription. Some need a different approach. But for the right patient, this medication can change the trajectory of their pain in a way that injections alone cannot.
You can schedule a consultation at modalpain.com/contact or call (646) 290-6660.