Liečivo
Semaglutid: čo ukazujú štúdie
Semaglutid v dávke 2,4 mg týždenne spôsobil približne 15 % priemerný úbytok hmotnosti za 68 týždňov. Toto číslo je reálne, replikované a často nesprávne interpretované.
Hlavná štúdia
STEP 1 randomizoval dospelých s nadváhou alebo obezitou a bez cukrovky na týždenný semaglutid 2,4 mg alebo placebo, oboje s intervenciou životného štýlu, na 68 týždňov [9]. Priemerná zmena hmotnosti bola približne −14,9 % na lieku v porovnaní s −2,4 % na placebe. Približne tretina účastníkov na lieku stratila 20 % alebo viac hmotnosti — výsledok, ktorý bol predtým doménou bariatrickej chirurgie.
Dve veci sú dôležité. Po prvé, to je priemer: rozdelenie je široké a podstatná menšina stratí veľmi málo. Po druhé, placebo skupina tiež dostávala poradenstvo o životnom štýle, takže 2,4 % nie je "nerobenie" — účinok lieku je meraný nad rámec poradenstva, ktoré samo o sebe niečo robí.
Číslo je menšie, ak máte cukrovku
STEP 2 mal rovnaký dizajn u dospelých s cukrovkou 2. typu a zistil približne 9,6 % úbytok hmotnosti pri rovnakej dávke [8]. Tento rozdiel medzi približne 15 % a približne 10 % sa opakuje v celej triede a nie je špecifický pre semaglutid. Porovnávacia meta-analýza naprieč agonistami GLP-1 ukazuje rovnaký vzor na oboch hmotnostných a glykemických ukazovateľoch [3].
| Štúdia | Populácia | Trvanie | Priemerná zmena hmotnosti | Placebo |
|---|---|---|---|---|
| STEP 1 [9] | Obezita, bez cukrovky | 68 týždňov | ≈ −14,9 % | ≈ −2,4 % |
| STEP 2 [8] | Obezita + cukrovka 2. typu | 68 týždňov | ≈ −9,6 % | ≈ −3,4 % |
| STEP 4 [7] | Pokračovanie vs. prerušenie po 20 týždňoch | 48 ďalších týždňov | Pokračovanie: ďalší úbytok | Prerušenie: opätovný nárast |
| SELECT [5] | Obezita + kardiovaskulárne ochorenie | ~4 roky | Udržaný ≈ −10 % | ≈ −1,5 % |
Ako dlho to funguje?
Dlhšie, než naznačovali 68-týždňové štúdie. Meta-analýza dlhodobých údajov zistila, že účinok sa udržuje dobre nad rámec jedného roka [1], a kardiovaskulárna štúdia SELECT — ktorá trvala približne štyri roky a nebola navrhnutá ako štúdia o hmotnosti — ukázala, že úbytok hmotnosti sa stabilizuje na približne 10 % a potom sa udržuje, nie znižuje [5]. Stabilizácia je reálna; zvrat, ktorý predpovedali kritici, nie je, ak sa liečba pokračuje.
Udržaný úbytok hmotnosti pri pokračujúcej liečbe
Semaglutid vs. tirzepatid
Pre cukrovku 2. typu, SURPASS-2 porovnával tirzepatid s semaglutidom 1 mg a favorizoval tirzepatid. Pre obezitu konkrétne, priame porovnanie pri dávkach na obezitu prišlo neskôr a bolo rozhodujúce: tirzepatid spôsobil podstatne väčší priemerný úbytok hmotnosti ako semaglutid [10], v súlade s predchádzajúcimi reálnymi a nepriame porovnaniami [11].
To automaticky nerobí tirzepatid správnou voľbou pre jednotlivca — tolerancia, náklady, dostupnosť a komorbidity na to všetko vplývajú — ale len na základe úbytku hmotnosti nie je poradie sporné. Pozrite sa na tirzepatid.
Kde má semaglutid za sebou usmernenie
Nielenže semaglutid má usmernenie pre metabolickú dysfunkciu spojenú s steatózou pečene, kde spoločné európske usmernenia sa zaoberajú jeho úlohou [2]. Je to tiež jediný prostriedok v triede s dokončenou štúdiou o kardiovaskulárnych výsledkoch v ne-diabetickej obeznej populácii [5], ktorá je pokrytá na kardiovaskulárnej stránke.
Časté otázky
Je Wegovy iný ako Ozempic?
Prečo som schudol menej ako 15 %?
Zastaví to fungovať po niekoľkých mesiacoch?
Môžem to užívať len na to, aby som schudol niekoľko kilogramov a potom prestal?
Odkazy
Každá citácia nižšie odkazuje na pôvodný recenzovaný záznam na PubMed alebo prostredníctvom DOI. Nič tu nie je náhradou za lekárske poradenstvo.
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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