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Semaglutid: što pokazuju studije
Semaglutid u dozi od 2,4 mg tjedno doveo je do prosječnog gubitka tjelesne mase od otprilike 15% tijekom 68 tjedana. Ta brojka je stvarna, potvrđena u više studija i često se pogrešno tumači.
Glavno ispitivanje
STEP 1 je nasumično raspodijelio odrasle osobe s prekomjernom tjelesnom masom ili pretilošću i bez dijabetesa u skupinu koja je tjedno primala semaglutid 2,4 mg ili placebo, obje uz intervenciju u životnom stilu, tijekom 68 tjedana [9]. Prosječna promjena tjelesne mase iznosila je otprilike −14,9% u skupini koja je primala lijek, u odnosu na −2,4% u skupini s placebom. Otprilike trećina ispitanika koji su primali lijek izgubila je 20% ili više tjelesne mase — ishod koji je prije bio domena bariatrijske kirurgije.
Dvije stvari vrijedi zapamtiti. Prvo, to je prosjek: raspodjela je široka, a znatna manjina izgubi vrlo malo. Drugo, skupina s placebom također je primala savjetovanje o životnom stilu, tako da onih 2,4% ne znači "ništa ne djeluje" — učinak lijeka mjeri se povrh savjeta koji sam po sebi djeluje.
Brojka je manja ako imate dijabetes
STEP 2 je proveo isti dizajn ispitivanja u odraslih osoba s tipom 2 dijabetesa i utvrdio gubitak tjelesne mase od otprilike 9,6% pri istoj dozi [8]. Ta razlika između oko 15% i oko 10% ponavlja se u cijeloj skupini lijekova i nije specifična za semaglutid. Usporedna meta-analiza agonista GLP-1 receptora pokazuje isti obrazac i za gubitak tjelesne mase i za glikemijske ishode [3].
| Ispitivanje | Populacija | Trajanje | Prosječna promjena težine | Placebo |
|---|---|---|---|---|
| STEP 1 [9] | Pretilost, bez dijabetesa | 68 tjedana | ≈ −14,9% | ≈ −2,4% |
| STEP 2 [8] | Pretilost + dijabetes tipa 2 | 68 tjedana | ≈ −9,6% | ≈ −3,4% |
| STEP 4 [7] | Nastavak liječenja u odnosu na prekid nakon 20 tjedana | dodatnih 48 tjedana | Nastavak: dodatni gubitak | Prekid: ponovni dobitak |
| SELECT [5] | Pretilost + kardiovaskularna bolest | ~4 godine | Održano ≈ −10% | ≈ −1,5% |
Koliko dugo djelovanje traje?
Dulje nego što su sugerirala ispitivanja koja su trajala 68 tjedana. Meta-analiza dugoročnih podataka pokazala je da se učinak održava znatno dulje od godine dana [1], a kardiovaskularno ispitivanje SELECT — koje je trajalo oko četiri godine i nije bilo osmišljeno kao ispitivanje gubitka tjelesne mase — pokazalo je da gubitak tjelesne mase dostiže plato od otprilike 10% i zatim se održava, umjesto da se smanjuje [5]. Plato je stvaran; povratak koji su kritičari predviđali nije, uz uvjet da liječenje traje.
Održani gubitak tjelesne mase uz nastavak liječenja
Semaglutid u odnosu na tirzepatid
Za tip 2 dijabetesa, ispitivanje SURPASS-2 usporedilo je tirzepatid sa semaglutidom u dozi od 1 mg i rezultat je favorizirao tirzepatid. Konkretno za pretilost, izravna usporedba pri dozama namijenjenima liječenju pretilosti provedena je kasnije i bila je odlučujuća: tirzepatid je doveo do znatno većeg prosječnog gubitka tjelesne mase od semaglutida [10], što je u skladu s ranijim opažanjima iz kliničke prakse i neizravnim usporedbama [11].
To automatski ne znači da je tirzepatid pravi izbor za svakog pojedinca — podnošljivost, cijena, dostupnost i prateće bolesti sve to utječu na odluku — ali gledano isključivo prema gubitku tjelesne mase, redoslijed nije upitan. Pogledajte tirzepatid.
Gdje semaglutid ima podršku smjernica
Osim gubitka tjelesne mase, semaglutid je ušao i u formalne smjernice za metabolički udruženu steatotičnu bolest jetre, gdje zajedničke europske smjernice razmatraju njegovu ulogu [2]. Također je jedini lijek iz te skupine s dovršenim kardiovaskularnim ispitivanjem ishoda u nedijabetičkoj pretiloj populaciji [5], što je obrađeno na stranici o kardiovaskularnim učincima.
Često postavljana pitanja
Razlikuje li se Wegovy od Ozempica?
Zašto sam izgubio/la manje od 15%?
Prestaje li djelovati nakon nekoliko mjeseci?
Mogu li ga uzimati samo da izgubim nekoliko kilograma i zatim prestati?
References
Every citation below links to the original peer-reviewed record on PubMed or via DOI. Nothing here is a substitute for medical advice.
-
Effect of glucagon-like peptide-1 receptor agonists and co-agonists on body composition: Systematic review and network meta-analysis Karakasis P, Patoulias D, Fragakis N, et al. · Metabolism: clinical and experimental · 2025 · Meta-analysis DOIPubMed 39719170
-
Subcutaneously administered tirzepatide vs semaglutide for adults with type 2 diabetes: a systematic review and network meta-analysis of randomised controlled trials Karagiannis T, Malandris K, Avgerinos I, et al. · Diabetologia · 2024 · Meta-analysis DOIPubMed 38613667Full text
-
Long-Term Efficacy and Safety of Once-Weekly Semaglutide for Weight Loss in Patients Without Diabetes: A Systematic Review and Meta-Analysis of Randomized Controlled Trials Moiz A, Levett JY, Filion KB, et al. · The American journal of cardiology · 2024 · Meta-analysis DOIPubMed 38679221
-
EASL-EASD-EASO Clinical Practice Guidelines on the management of metabolic dysfunction-associated steatotic liver disease (MASLD) Journal of hepatology · 2024 · Clinical guideline DOIPubMed 38851997
-
A systematic review of the effect of semaglutide on lean mass: insights from clinical trials Bikou A, Dermiki-Gkana F, Penteris M, et al. · Expert opinion on pharmacotherapy · 2024 · Systematic review DOIPubMed 38629387
-
Comparative effectiveness of GLP-1 receptor agonists on glycaemic control, body weight, and lipid profile for type 2 diabetes: systematic review and network meta-analysis Yao H, Zhang A, Li D, et al. · BMJ (Clinical research ed.) · 2024 · Meta-analysis DOIPubMed 38286487Full text
-
Assessment of Thyroid Carcinogenic Risk and Safety Profile of GLP1-RA Semaglutide (Ozempic) Therapy for Diabetes Mellitus and Obesity: A Systematic Literature Review Feier CVI, Vonica RC, Faur AM, et al. · International journal of molecular sciences · 2024 · Systematic review DOIPubMed 38673931Full text
-
Once-weekly semaglutide for obesity or overweight: A systematic review and meta-analysis He K, Guo Q, Zhang H, et al. · Diabetes, obesity & metabolism · 2022 · Meta-analysis DOIPubMed 34866313
-
Efficacy and Safety of Semaglutide for Weight Loss in Obesity Without Diabetes: A Systematic Review and Meta-Analysis Tan HC, Dampil OA, Marquez MM · Journal of the ASEAN Federation of Endocrine Societies · 2022 · Meta-analysis DOIPubMed 36578889Full text
-
Once-weekly semaglutide 7·2 mg in adults with obesity (STEP UP): a randomised, controlled, phase 3b trial Wharton S, Freitas P, Hjelmesæth J, et al. · The lancet. Diabetes & endocrinology · 2025 · Randomised controlled trial DOIPubMed 40961952
-
Oral Semaglutide at a Dose of 25 mg in Adults with Overweight or Obesity Wharton S, Lingvay I, Bogdanski P, et al. · The New England journal of medicine · 2025 · Randomised controlled trial DOIPubMed 40934115
-
Coadministered Cagrilintide and Semaglutide in Adults with Overweight or Obesity Garvey WT, Blüher M, Osorto Contreras CK, et al. · The New England journal of medicine · 2025 · Randomised controlled trial DOIPubMed 40544433
-
Cagrilintide-Semaglutide in Adults with Overweight or Obesity and Type 2 Diabetes Davies MJ, Bajaj HS, Broholm C, et al. · The New England journal of medicine · 2025 · Randomised controlled trial DOIPubMed 40544432
-
evoke and evoke+: design of two large-scale, double-blind, placebo-controlled, phase 3 studies evaluating efficacy, safety, and tolerability of semaglutide in early-stage symptomatic Alzheimer's disease Cummings JL, Atri A, Feldman HH, et al. · Alzheimer's research & therapy · 2025 · Randomised controlled trial DOIPubMed 39780249Full text
-
Semaglutide versus placebo in people with obesity-related heart failure with preserved ejection fraction: a pooled analysis of the STEP-HFpEF and STEP-HFpEF DM randomised trials Butler J, Shah SJ, Petrie MC, et al. · Lancet (London, England) · 2024 · Randomised controlled trial DOIPubMed 38599221Full text
-
Semaglutide and cardiovascular outcomes in patients with obesity and prevalent heart failure: a prespecified analysis of the SELECT trial Deanfield J, Verma S, Scirica BM, et al. · Lancet (London, England) · 2024 · Randomised controlled trial DOIPubMed 39181597
-
Long-term weight loss effects of semaglutide in obesity without diabetes in the SELECT trial Ryan DH, Lingvay I, Deanfield J, et al. · Nature medicine · 2024 · Randomised controlled trial DOIPubMed 38740993Full text
-
Long-term kidney outcomes of semaglutide in obesity and cardiovascular disease in the SELECT trial Colhoun HM, Lingvay I, Brown PM, et al. · Nature medicine · 2024 · Randomised controlled trial DOIPubMed 38796653Full text
-
Once-Weekly Semaglutide in Persons with Obesity and Knee Osteoarthritis Bliddal H, Bays H, Czernichow S, et al. · The New England journal of medicine · 2024 · Randomised controlled trial DOIPubMed 39476339
-
Semaglutide and Cardiovascular Outcomes in Obesity without Diabetes Lincoff AM, Brown-Frandsen K, Colhoun HM, et al. · The New England journal of medicine · 2023 · Randomised controlled trial DOIPubMed 37952131
-
Semaglutide once a week in adults with overweight or obesity, with or without type 2 diabetes in an east Asian population (STEP 6): a randomised, double-blind, double-dummy, placebo-controlled, phase 3a trial Kadowaki T, Isendahl J, Khalid U, et al. · The lancet. Diabetes & endocrinology · 2022 · Randomised controlled trial DOIPubMed 35131037
-
Two-year effects of semaglutide in adults with overweight or obesity: the STEP 5 trial Garvey WT, Batterham RL, Bhatta M, et al. · Nature medicine · 2022 · Randomised controlled trial DOIPubMed 36216945Full text
-
Weight regain and cardiometabolic effects after withdrawal of semaglutide: The STEP 1 trial extension Wilding JPH, Batterham RL, Davies M, et al. · Diabetes, obesity & metabolism · 2022 · Randomised controlled trial DOIPubMed 35441470Full text
-
Effect of Subcutaneous Semaglutide vs Placebo as an Adjunct to Intensive Behavioral Therapy on Body Weight in Adults With Overweight or Obesity: The STEP 3 Randomized Clinical Trial Wadden TA, Bailey TS, Billings LK, et al. · JAMA · 2021 · Randomised controlled trial DOIPubMed 33625476Full text
-
Effect of Continued Weekly Subcutaneous Semaglutide vs Placebo on Weight Loss Maintenance in Adults With Overweight or Obesity: The STEP 4 Randomized Clinical Trial Rubino D, Abrahamsson N, Davies M, et al. · JAMA · 2021 · Randomised controlled trial DOIPubMed 33755728Full text
-
Semaglutide 2·4 mg once a week in adults with overweight or obesity, and type 2 diabetes (STEP 2): a randomised, double-blind, double-dummy, placebo-controlled, phase 3 trial Davies M, Færch L, Jeppesen OK, et al. · Lancet (London, England) · 2021 · Randomised controlled trial DOIPubMed 33667417
-
Once-Weekly Semaglutide in Adults with Overweight or Obesity Wilding JPH, Batterham RL, Calanna S, et al. · The New England journal of medicine · 2021 · Randomised controlled trial DOIPubMed 33567185
-
The effect of semaglutide 2.4 mg once weekly on energy intake, appetite, control of eating, and gastric emptying in adults with obesity Friedrichsen M, Breitschaft A, Tadayon S, et al. · Diabetes, obesity & metabolism · 2021 · Randomised controlled trial DOIPubMed 33269530Full text
-
Semaglutide versus dulaglutide once weekly in patients with type 2 diabetes (SUSTAIN 7): a randomised, open-label, phase 3b trial Pratley RE, Aroda VR, Lingvay I, et al. · The lancet. Diabetes & endocrinology · 2018 · Randomised controlled trial DOIPubMed 29397376
-
Effects of once-weekly semaglutide on appetite, energy intake, control of eating, food preference and body weight in subjects with obesity Blundell J, Finlayson G, Axelsen M, et al. · Diabetes, obesity & metabolism · 2017 · Randomised controlled trial DOIPubMed 28266779Full text
-
Tirzepatide as Compared with Semaglutide for the Treatment of Obesity Aronne LJ, Horn DB, le Roux CW, et al. · The New England journal of medicine · 2025 · Clinical trial DOIPubMed 40353578
-
Semaglutide vs Tirzepatide for Weight Loss in Adults With Overweight or Obesity Rodriguez PJ, Goodwin Cartwright BM, Gratzl S, et al. · JAMA internal medicine · 2024 · Journal article DOIPubMed 38976257Full text