The complete GLP-1 FAQ
Every question we have answered about GLP-1 medications, grouped by topic. Click any question for the short answer, or open the full page for details, context, and sources.
GLP-1 Basics
What GLP-1s are, how they work, and why they cause weight loss.
Are GLP-1s safe to take long-term?
The class has 15+ years of human use (liraglutide since 2010) and large multi-year trials showing sustained safety — including the SELECT trial, where semaglutide reduced heart attacks and strokes by 20% over ~3 years. Known serious risks (pancreatitis, gallbladder disease) are uncommon, and obesity itself carries larger long-term risks for most candidates.
Can you increase GLP-1 naturally, without medication?
You can nudge natural GLP-1 release with protein, fiber, fermented foods, and exercise — but the effect is tiny compared to medication. Natural GLP-1 survives about two minutes in the blood; drugs maintain week-long levels far above anything diet can produce. Helpful habits, yes; a substitute, no.
Do GLP-1s work without diet and exercise?
Yes — the trials' weight loss came mostly from the drug's appetite suppression, with only modest lifestyle coaching. But "works without exercise" comes with a real cost: without resistance training and adequate protein, a larger share of the weight you lose is muscle, which hurts metabolism and long-term maintenance.
How do GLP-1s cause weight loss?
GLP-1s reduce weight by making you eat less, three ways at once — they signal fullness to the brain, slow stomach emptying so meals satisfy longer, and quiet food cravings. They don't meaningfully "burn fat" or speed metabolism; they make a calorie deficit feel easy instead of miserable.
How long do GLP-1s take to start working?
Appetite suppression usually starts within the first week — often after the first dose. Visible weight loss typically begins within 2–4 weeks, but the big results take months because doses start low and climb gradually; trial participants were still losing at week 60+.
What is "food noise" and do GLP-1s really silence it?
Food noise is the constant, intrusive background thinking about food — planning the next meal while eating this one, fighting cravings all day. Quieting it is one of the most consistently reported GLP-1 effects, likely because the drugs act on appetite and reward circuits in the brain, not just the stomach.
What is a GLP-1 medication?
GLP-1 medications (like semaglutide and tirzepatide) are synthetic versions of a natural gut hormone that controls appetite and blood sugar. They make you feel full sooner and quiet hunger between meals, producing 8–21% average body-weight loss in clinical trials depending on the drug.
What's the difference between GLP-1 and GIP?
GLP-1 and GIP are both "incretin" gut hormones released after eating. GLP-1 drives fullness and slows digestion; GIP works on fat tissue and insulin response. Tirzepatide activates both receptors at once, which appears to be why it produces more weight loss than GLP-1-only drugs like semaglutide.
Medications & Forms
Semaglutide vs. tirzepatide, brands vs. compounded, injections vs. sublingual and oral forms.
Does sublingual semaglutide or tirzepatide actually work?
Honestly: probably yes for many people, but with weaker and less predictable results than injections, and without randomized trials to quantify it. Peptides absorb less efficiently through the mouth's lining, so formulation quality matters enormously. If you try it, judge by your own 8–12 week results.
GLP-1 pills vs. injections — which should I choose?
Injections currently win on results — weekly semaglutide or tirzepatide delivers 15–21% average loss, while the approved pill (Rybelsus) delivers far less at current doses and demands a strict fasting ritual daily. Needle-free alternatives exist (Rybelsus, compounded sublingual tablets, stronger pills in the pipeline), but each trades some evidence or efficacy for the convenience.
Semaglutide vs. tirzepatide — which is better for weight loss?
For pure weight loss, tirzepatide wins on the data — about 20% average loss vs. 14% for semaglutide in the head-to-head SURMOUNT-5 trial. Semaglutide counters with proven heart-attack and stroke reduction (SELECT), a longer track record, and often better coverage. Both are excellent; tolerability and cost decide many real cases.
What is compounded semaglutide and is it safe?
Compounded semaglutide is the same active molecule prepared by a licensed pharmacy for an individual prescription rather than sold as the factory brand. From a properly licensed 503A/503B pharmacy it has a reasonable safety record and costs a fraction of brand price — but it's not FDA-approved, quality varies by pharmacy, and it must never be confused with gray-market "research" vials.
What is retatrutide and when will it be available?
Retatrutide is an investigational "triple agonist" (GLP-1 + GIP + glucagon) that produced about 24% average weight loss in phase 2 — the most ever recorded for a medication. It's in phase 3 trials with earliest plausible approval around 2026–2027. Anything sold as retatrutide today is gray-market and unsafe.
What is semaglutide with vitamin B6?
A compounded formulation — usually a sublingual tablet — that combines semaglutide with pyridoxine (vitamin B6), an evidence-backed anti-nausea vitamin. The idea is to soften the GLP-1's most common side effect in the same dose. It's a reasonable, low-risk pairing, though the combination itself hasn't been trialed.
What is sublingual semaglutide?
A compounded form of semaglutide that dissolves under the tongue — usually a weekly rapid-dissolve tablet (RDT) or drops — for people who want GLP-1 therapy without injections. It is not FDA-approved, is not the same as Rybelsus, and its doses are not interchangeable with injection doses.
What is the best GLP-1 for weight loss?
By trial data, tirzepatide (Zepbound) — about 20% average loss, the most of any approved drug. But "best" is personal: semaglutide has proven heart protection, better generic/compounded economics, and an oral option; and individual response varies enough that the best drug is ultimately the one you tolerate, afford, and stay on.
What's the difference between Mounjaro and Zepbound?
Identical drug — both are weekly tirzepatide from Eli Lilly. Mounjaro is approved for type 2 diabetes, Zepbound for weight management and sleep apnea. Same doses (2.5–15 mg), same effects; insurance coverage rules are the real difference.
What's the difference between Ozempic and Wegovy?
Same drug, different packaging and approvals. Both are weekly semaglutide injections — Ozempic is approved for type 2 diabetes (doses to 2 mg), Wegovy for weight management (doses to 2.4 mg). Insurance treats them completely differently, which is usually what actually decides which one you get.
Weight Loss Results
How much weight people lose, how fast, plateaus, and who qualifies.
Can I get a GLP-1 if my BMI is under 27?
Sometimes — but only through documented off-label prescribing, and the legitimate version is narrow. The recognized scenarios are BMI ≥ 25 with comorbidities, or relapse-prevention in someone with a documented history of obesity or prior GLP-1 treatment, often using low-dose ("microdose") protocols with mandatory provider review. Healthy-weight cosmetic use is appropriately refused.
Can I use a GLP-1 just to lose 10–15 vanity pounds?
Medically, this is where responsible prescribing says no. At healthy BMIs the risk-benefit math inverts — real (if uncommon) risks like pancreatitis and gallbladder disease, plus muscle loss and near-certain rebound on stopping, are being traded for a cosmetic goal the drug wasn't studied for. Programs that refuse are showing good judgment, not gatekeeping.
Do GLP-1s burn fat or just reduce appetite?
Almost entirely appetite — current GLP-1s create weight loss by reducing how much you eat, not by burning fat or raising metabolism. (If anything, metabolism falls as you shrink, like in any weight loss.) The exception is in the pipeline — retatrutide's glucagon component adds a genuine energy-burning mechanism.
How fast will I lose weight on a GLP-1?
Expect roughly 1–2% of body weight in month one (on starter doses), accelerating to about 1–2 lbs per week through the middle months, with the total building to 15–20% over 12–18 months. Faster isn't better — rapid early loss costs more muscle and more gallstone risk.
How much weight will I lose on a GLP-1?
Trial averages over roughly a year and a half — semaglutide ~15% of body weight, tirzepatide ~21%, liraglutide ~8%. For a 220 lb person that's roughly 33, 46, or 18 lbs respectively. Individual results spread widely around those averages, and dose, duration, and protein/exercise habits all move the number.
Who qualifies for GLP-1 weight-loss medication?
The FDA-labeled criteria: BMI ≥ 30, or BMI ≥ 27 with at least one weight-related condition (hypertension, type 2 diabetes, high cholesterol, sleep apnea, heart disease). Clinicians may also prescribe off-label in other situations. Absolute disqualifiers exist regardless of BMI — thyroid cancer history (MTC/MEN 2), pregnancy, and pancreatitis history lead the list.
Why am I not losing weight on my GLP-1?
The usual suspects, in order: you're still on early titration doses (too soon to judge), liquid calories or grazing are slipping past the appetite suppression, the dose has room to go up, or — for compounded/sublingual forms — absorption or product quality is in question. True non-response exists but is the minority; audit the fixable causes first.
Why have I plateaued on my GLP-1, and what can I do?
Every GLP-1 course plateaus eventually — usually 12–18 months in — because the body adapts its energy needs to the smaller intake. If you've hit goal, the plateau IS maintenance: mission accomplished. If you haven't, the options are dose escalation, switching molecules, tightening liquid calories and protein, or accepting the result — all legitimate.
Side Effects & Safety
Nausea, fatigue, hair loss, muscle loss, serious risks, and warning signs.
Can GLP-1s cause depression or mood changes?
Large reviews — including FDA's own 2024 analysis — have not found evidence that GLP-1s cause depression or suicidal thoughts; some studies actually show mood improving with weight loss. But labels advise monitoring, people with active psychiatric instability were screened out of trials, and any new dark mood on therapy deserves prompt attention regardless of statistics.
Can GLP-1s cause gallbladder problems?
Yes — gallstones and gallbladder inflammation occur in roughly 1–3% of users, driven largely by rapid weight loss itself (bile chemistry changes when fat mobilizes fast). Watch for right-upper-belly pain after fatty meals, especially with fever or yellowing — that combination is urgent.
Do GLP-1s cause muscle loss?
They cause weight loss, and 25–40% of rapidly lost weight is lean mass unless you defend it — the same as any major calorie deficit. The defense is non-negotiable and two-part — a daily protein floor and resistance training 2–3× weekly — because arriving at goal weight weaker, with a slower metabolism, undermines the whole project.
Do GLP-1s cause thyroid cancer? What's the boxed warning about?
The boxed warning comes from rodent studies, where GLP-1s caused thyroid C-cell tumors; the link has never been confirmed in humans, and large human datasets are mostly reassuring. Out of caution, anyone with a personal or family history of medullary thyroid carcinoma (MTC) or MEN 2 must not take any GLP-1 — that part is absolute.
Does GLP-1 medication cause hair loss?
Indirectly. The shedding (telogen effluvium) is triggered by rapid weight loss itself — it happens after bariatric surgery and crash diets too — not by drug toxicity. It typically starts months 2–4, peaks around month 5, and regrows fully once weight stabilizes. Protein adequacy and slower loss are the levers.
How do I deal with constipation on a GLP-1?
Constipation hits 15–25% of users and outlasts the nausea, so manage it actively: fiber built up gradually (psyllium works), genuinely adequate water, daily movement, and magnesium or Miralax as gentle staples. See a clinician for severe pain, blood, or going a week without relief.
How do I stop nausea on a GLP-1?
Smaller, slower, blander, colder meals; fluids between rather than with meals; ginger or vitamin B6; and prescribed ondansetron as a backstop for bad days. If nausea is constant rather than episodic, the fix is slowing the titration — staying longer at a lower dose beats quitting at a higher one.
What are the most common side effects of GLP-1s?
Gastrointestinal, front-loaded, and mostly manageable — nausea (25–45% at some point), constipation, diarrhea, fatigue, and reflux, clustering around dose increases and fading as the gut adapts. Serious risks are uncommon: pancreatitis, gallbladder disease, and a rodent-based thyroid warning that drives the contraindications.
What is "Ozempic face" and can I prevent it?
A media nickname for facial volume loss after losing a lot of weight quickly — gaunt cheeks, deeper folds, looser skin. It's a feature of major weight loss from any cause, not a drug effect. Slower loss, protein, hydration, and time blunt it; dermatologic fillers exist for those who want them.
What is the pancreatitis risk with GLP-1s?
Low but real — trial rates run a few cases per thousand users, and large analyses haven't shown a clear excess over comparable populations. Two rules cover it: a history of pancreatitis generally rules out GLP-1 use, and severe persistent upper-abdominal pain radiating to the back means stop the drug and seek care immediately.
Which GLP-1 symptoms mean I should call a doctor immediately?
Six urgent patterns: severe persistent abdominal pain (especially radiating to the back), right-upper-belly pain with fever or yellowing, vomiting you can't keep fluids through, allergic signs (face/throat swelling, trouble breathing — call 911), hypoglycemia symptoms if you also take insulin or sulfonylureas, and sudden vision changes with diabetes.
Why am I so tired on my GLP-1?
Early fatigue is common and usually nutritional, not pharmacological: you're abruptly eating far less, often skimping protein, and under-drinking. Fix the floor — protein target, fluids, electrolytes, 1,000+ calories — and most fatigue lifts in 2–4 weeks. Persistent exhaustion warrants labs (iron, B12, thyroid) and a dose conversation.
Dosing & Administration
Titration schedules, microdosing, injection technique, missed doses, and storage.
Can I change my GLP-1 injection day?
Yes — the only rule is keeping at least 48 hours (Wegovy) to 72 hours (some labels) between doses, with 48 hours the common floor. Shift gradually or in one jump as long as you respect the gap; many people deliberately move to Friday evenings so any post-dose queasiness lands on the weekend.
How do I inject a GLP-1 correctly?
Subcutaneous, once weekly, ten seconds of mild effort: rotate among abdomen (2+ inches from the navel), front of thigh, or back of upper arm; let the pen sit out a few minutes and the alcohol dry; pinch, insert at 90°, hold to the count the device specifies, dispose in a sharps container. Needles are 4–5 mm — most people feel almost nothing.
How do I store my GLP-1 — and travel with it?
Refrigerate at 36–46°F, never freeze (frozen = trash, even thawed). Out of the fridge, the big brands tolerate weeks at room temperature — Wegovy up to 28 days, Zepbound 21, Ozempic 56 after first use — which makes most trips easy. Fly with it in carry-on, never checked baggage.
How do I switch from semaglutide to tirzepatide (or between GLP-1 forms)?
Switching is routine but not a unit conversion — there's no official equivalence chart between molecules. Standard practice: finish one drug's week, then start the other at a deliberately modest step chosen by your prescriber (often 5 mg tirzepatide for someone from mid/high-dose semaglutide), accepting a brief adjustment period rather than risking a nausea cliff.
I missed my GLP-1 dose — what should I do?
Weekly injectables: if you're within about 4–5 days of the missed dose, take it when you remember and resume your schedule; if the next dose is closer, skip — never double. Off for 2+ weeks? Call your prescriber: restarting at a lower step is often safer than resuming full dose, because gut tolerance fades fast.
What is GLP-1 microdosing and does it work?
Microdosing means deliberately using doses below the standard ladders — for maintenance after goal weight, for very drug-sensitive people, or for documented relapse prevention at lower BMIs. It's biologically plausible (appetite effects appear even at starter doses) and clinically practiced, but no dedicated trials have validated it, so it lives in honest off-label territory with guardrails.
What is the semaglutide dosing schedule?
Wegovy's labeled ladder: 0.25 mg weekly for 4 weeks, then 0.5 → 1.0 → 1.7 → 2.4 mg, each step 4+ weeks. Ozempic climbs 0.25 → 0.5 → 1 → 2 mg. Staying longer at any step — or maintaining below the top dose — is normal practice, not falling behind. Compounded and sublingual ladders use different numbers entirely.
What is the tirzepatide dosing schedule?
Zepbound/Mounjaro start at 2.5 mg weekly for 4 weeks, then 5 mg; from there, optional 2.5 mg increases every 4+ weeks through 7.5, 10, 12.5, to 15 mg. Unlike semaglutide, three maintenance doses are officially recognized (5, 10, 15 mg) — many people stay at 5–7.5 mg long-term and lose excellently.
Cost & Access
Prices, insurance, savings programs, telehealth, and how to buy safely.
Are telehealth GLP-1 programs legitimate?
The good ones, yes — telehealth prescribing of GLP-1s is legal in all 50 states and is how a large share of patients now access treatment. Legitimacy lives in the details — licensed clinicians who actually screen you, named licensed pharmacies, honest labeling of compounded products, and a human to call afterward. Established programs clear that bar; plenty of websites wearing the costume don't.
Do I need a prescription for GLP-1 medications?
Yes — every legitimate GLP-1 in every form (brand pens, compounded vials, sublingual tablets, oral semaglutide) is prescription-only in the U.S. The prescription can come from your own doctor or a telehealth clinician after proper screening. Anything obtainable without one is by definition outside the regulated supply — and that's the dangerous part.
Does Medicare or Medicaid cover GLP-1s for weight loss?
Medicare: not for weight loss itself (a statutory exclusion), but yes for adjacent indications — diabetes (Ozempic/Mounjaro), cardiovascular risk reduction (Wegovy post-SELECT), and sleep apnea (Zepbound) — so the diagnosis often decides everything. Medicaid: varies by state, with a growing minority covering obesity treatment. Documentation of qualifying conditions is the whole game.
How do I spot fake or scam GLP-1 sellers?
Five instant disqualifiers: no prescription required; "research use only" labeling on something marketed for weight loss; no nameable licensed pharmacy; prices too good to be true (sub-$150 "semaglutide"); and selling unapproved molecules like retatrutide at all. Any one of these ends the evaluation — counterfeit GLP-1s have hospitalized people with wrong doses and wrong drugs entirely.
How much do GLP-1s cost without insurance?
Realistic 2026 cash prices: brand-name via manufacturer direct programs ~$349–$549/month (Wegovy through NovoCare, Zepbound vials through LillyDirect); compounded semaglutide ~$199–$399 and compounded tirzepatide ~$250–$450 through telehealth programs, usually with visits included. Nobody should pay the $1,000+ list prices.
What GLP-1 savings programs and discounts exist?
Three tiers: manufacturer savings cards (Wegovy/Zepbound copays down to ~$25–$150/month — but only with commercial insurance), manufacturer direct-to-patient cash pharmacies (NovoCare ~$499, LillyDirect vials ~$349–$499), and the cash-pay compounded lane (~$199–$450). GoodRx-style coupons barely dent this class; the structural programs are where the money is.
What questions should I ask a telehealth GLP-1 provider before signing up?
Five that sort the field fast: (1) Which licensed pharmacy fills this, 503A or 503B? (2) Is this product FDA-approved — and do you say so honestly? (3) Who reviews my history, and can they decline me? (4) What happens when I get side effects at 9pm — is there a human, ideally a phone? (5) What's the all-in monthly cost and the cancellation policy? Hesitation on any of them is your answer.
Where can I buy GLP-1 medication online safely?
Three safe online lanes: manufacturer direct pharmacies (NovoCare for Wegovy, LillyDirect for Zepbound) for brand at $349–$549/month; established telehealth programs for compounded therapy at $199–$450; and your own doctor's e-prescription to a verified online pharmacy. Everything without a prescription and a licensed pharmacy is the unsafe lane.
Why is compounded semaglutide so much cheaper than Wegovy?
Because you're not paying for the brand. Pharmacies buy the active ingredient and prepare it directly, skipping the manufacturer's pricing power, patent premium, marketing, and the U.S. rebate machinery. The molecule is the same; what you give up is FDA review of the finished product and factory-level consistency — not (at licensed pharmacies) the drug itself.
Will my insurance cover a GLP-1 for weight loss?
Coin flip, honestly: many commercial plans cover Wegovy or Zepbound with prior authorization (BMI criteria, sometimes step therapy), but a large share of employer plans still exclude weight-loss drugs entirely. Diabetes GLP-1s (Ozempic, Mounjaro) are covered far more readily — with a T2D diagnosis. Check your plan's formulary directly and expect to appeal a first denial.
Diet & Lifestyle
What to eat, what to avoid, alcohol, protein, and exercise on a GLP-1.
Can I drink alcohol on a GLP-1?
No hard prohibition — but three real frictions: alcohol irritates a slowed stomach (nausea/reflux), its calories bypass fullness and stall progress, and with insulin or sulfonylureas it compounds hypoglycemia risk. Many users also find their desire to drink drops sharply on the drug. If you do drink: with food, lightly, and never on a fresh dose-increase week.
Do I need to exercise on a GLP-1 — and what kind?
The weight comes off either way — but exercise decides what the loss is made of. Resistance training 2–3×/week is the near-mandatory piece (muscle defense); walking and cardio are excellent supporting players for health, mood, and maintenance. Start absurdly small if starting from zero; the medication makes movement easier within months.
Do I still need to "diet" while on a GLP-1?
Not in the restriction-and-willpower sense — the medication does that part. What remains is composition work: hitting protein, keeping fiber and fluids up, and not letting liquid calories tunnel under the appetite suppression. Think "make the small amount count," not "eat less than you want."
How much protein do I need on a GLP-1?
Target roughly 1.2–1.6 g per kg of goal body weight daily — about 85–110 g for someone aiming at 70 kg (155 lb) — which is deliberately higher than standard recommendations because rapid weight loss raids muscle. On a suppressed appetite this takes engineering: protein first at meals, liquid protein on low days.
What foods should I avoid on a GLP-1?
Nothing is chemically forbidden — "avoid" really means "will make you feel awful or stall progress." The feel-awful list: fried/fatty meals, huge portions, very sweet desserts, and carbonation (worst around dose increases). The stall list: liquid calories and grazing-friendly snack foods that slip past fullness signals.
What should I eat while on a GLP-1?
Protein first at every meal (the muscle-protection rule), then fiber-rich plants, then everything else in the small space remaining. Favor what a slowed stomach handles well — eggs, yogurt, fish, soups, smoothies, soft-cooked vegetables — and watch liquid calories, which sneak past the appetite suppression.
Stopping & Maintenance
Weight regain, tapering, maintenance dosing, and how long people stay on.
How do I taper off a GLP-1 instead of stopping cold?
No official taper protocol exists — labels just say stop — but common clinical practice steps the dose down one rung every 4–8 weeks while watching weight and appetite, with a pre-agreed resume trigger (e.g., regaining 5%). The taper's real function is diagnostic: it reveals, rung by rung, how much drug your maintenance actually requires — which for many people turns out to be "a little, not zero."
How long do people stay on GLP-1s?
The medical framing: obesity is chronic, so treatment is open-ended — loss phase 12–18 months, then maintenance indefinitely, often at lower doses. The real-world data shows many people stop within a year (cost, side effects, supply), which is exactly the population the regain statistics describe. Plan for years, adjust as you go.
What's a maintenance dose of a GLP-1 after reaching goal weight?
Officially: Wegovy 1.7–2.4 mg and Zepbound 5/10/15 mg are all labeled maintenance doses — staying put is the by-the-book answer. In practice, many prescribers step patients down after goal (lower rung, stretched intervals, or compounded fractional doses) and titrate to the lowest dose that holds weight and appetite quiet. There's no universal number; it's found per person, by descent.
Will I regain weight if I stop my GLP-1?
Most likely, most of it — the extension studies are blunt: about two-thirds of lost weight returned within a year of stopping semaglutide (STEP 1 extension), and tirzepatide withdrawal showed the same shape (SURMOUNT-4). It's hormone biology, not weak character — appetite returns while the metabolic budget stays shrunk. The realistic options: stay on at lower maintenance doses, taper with a habit fortress, or accept partial regain.
Special Situations
Pregnancy, PCOS, diabetes, older adults, drug interactions, and surgery.
Are GLP-1s safe for older adults (65+)?
Trials included thousands of 65+ participants with comparable efficacy and no unique safety signal — age alone is no bar. The age-specific concern is muscle: older adults start with less and regrow it slower, so the protein-plus-resistance-training defense shifts from advisable to essentially mandatory, and prescribers reasonably favor slower titration and closer monitoring past 75 or with frailty.
Can I take a GLP-1 while pregnant, breastfeeding, or trying to conceive?
No, no, and stop first: GLP-1s are contraindicated in pregnancy (animal data shows fetal harm; weight loss itself endangers a pregnancy), discontinue at least 2 months before trying to conceive (semaglutide's washout), and skip them while breastfeeding — transfer into human milk is unstudied. Surprise pregnancies on the drug happen; stop immediately and call your OB, without panic.
Do GLP-1s help with PCOS?
Promisingly, yes — PCOS is tightly wound around insulin resistance and weight, and GLP-1 weight loss frequently improves cycles, androgens, and metabolic markers; small trials show GLP-1s beating or augmenting metformin. Use is off-label for PCOS itself, and the fertility kicker cuts both ways: restored ovulation plus weakened oral contraceptives means pregnancy can arrive uninvited.
Do I need to stop my GLP-1 before surgery?
Tell every anesthesia team you're on one — slowed stomach emptying raises aspiration risk under sedation. Current guidance has evolved from blanket hold-a-week rules to individualized plans: many teams now proceed with a 24-hour liquid diet beforehand, others still prefer holding a weekly dose; elective cases follow the anesthesiologist's protocol, and the non-negotiable is disclosure, not any specific rule.
How do GLP-1s work if I have type 2 diabetes?
They're arguably the best-case drugs for T2D-plus-weight — lowering A1c, weight, and (proven for several) cardiovascular risk simultaneously, which is why guidelines rank them highly. Two practical differences from non-diabetic use: insurance is far friendlier (Ozempic/Mounjaro on-label), and your insulin or sulfonylurea usually needs a dose cut when you start, or stacked hypoglycemia follows.
What medications interact with GLP-1s?
GLP-1s are clean metabolically (no CYP drama) — their interactions run through two mechanisms instead: stacked hypoglycemia with insulin and sulfonylureas (those need pre-emptive dose cuts), and slowed stomach emptying altering absorption of timing-sensitive oral drugs — oral contraceptives (use backup during titration), levothyroxine, warfarin, and narrow-window seizure or transplant medications head that list.