FDA ReviewedUpdated July 5, 2026

Semaglutide Guide

Semaglutide is a GLP-1 receptor agonist approved by the FDA for both type 2 diabetes management and chronic weight management. It has become one of the most prescribed medications in the United States, with clinical trials demonstrating weight loss of up to 15% of body weight.

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By Eli Marsden · Founding Editor
Editorially reviewed (not clinically reviewed) · How we verify contentLast reviewed

At a Glance

Generic NameSemaglutide
Brand NamesOzempic, Wegovy, Rybelsus
FDA StatusFDA-approved for type 2 diabetes as Ozempic (2017) and Rybelsus (2019); FDA-approved for chronic weight management as Wegovy (2021)[1][2]
Approval DateJune 4, 2021[1]

How Semaglutide Works

Semaglutide mimics the naturally occurring hormone GLP-1 (glucagon-like peptide-1), which is released after eating. It activates GLP-1 receptors in the brain to reduce appetite and increase feelings of fullness, while also slowing gastric emptying so food stays in the stomach longer. These combined effects lead to reduced caloric intake and meaningful, sustained weight loss.[3][6]

Dosing Schedule

Semaglutide uses a gradual dose escalation to minimize side effects. Always follow your prescriber's guidance and the current FDA label[1].

Weeks 1–40.25mg/week
Weeks 5–80.5mg/week
Weeks 9–121.0mg/week
Weeks 13–161.7mg/week
Week 17+2.4mg/week (maintenance)

Side Effects

Common: nausea, vomiting, diarrhea, constipation, abdominal pain, decreased appetite, headache, fatigue. Serious (rare): pancreatitis, gallbladder disease, kidney problems, diabetic retinopathy complications, increased heart rate. Rare thyroid C-cell tumors observed in animal studies — contraindicated in patients with personal or family history of MTC or MEN2.[1][3]

This is not a complete list. Consult your healthcare provider or prescriber for full safety information. The complete adverse reaction profile is published in the current FDA prescribing information[1].

Clinical Trial Results

In the landmark STEP-1 trial (N=1,961), adults treated with semaglutide 2.4mg achieved an average body weight loss of 14.9% over 68 weeks, compared to 2.4% in the placebo group. 86.4% of participants lost at least 5% of body weight, versus 31.5% with placebo.[3][4][5]

Source: Published clinical trial data (STEP / SURMOUNT trial series) — see the Sources panel below for full citations.

Where to Get Semaglutide

These telehealth providers offer access to semaglutide or compounded equivalents with online consultations and home delivery.

8.6/ 10
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Enhance MD

Best for: lab-monitored compounded GLP-1 with mandatory video visit

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Editorial score · methodology

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CompoundedSemaglutideTirzepatide
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Embody

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CompoundedSemaglutideTirzepatide
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Editorial score · methodology

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CompoundedSemaglutide
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Telos Rx

Best for: Needle-free and microdosed compounded GLP-1 options with lab-monitored care

★★★★☆4.1

Editorial score · methodology

$49/mo
CompoundedSemaglutideTirzepatide
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Strut Health

Best for: oral-lozenge compounded GLP-1 access

★★★★☆4.1

Editorial score · methodology

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CompoundedSemaglutideTirzepatideLegitScript Verified
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Live Vital

Best for: shoppers who want low-cost, physician-led compounded GLP-1 with peptide and hormone options

★★★★☆4

Editorial score · methodology

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CompoundedSemaglutideTirzepatide
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Cost Comparison

Semaglutide cost & pricing →How to get it →

Starting prices for compounded GLP-1 medications from top providers, sorted cheapest first. Compounded semaglutide from licensed 503A and 503B pharmacies is legal under federal compounding law[7], with additional tolerances historically allowed while the molecule has appeared on the FDA Drug Shortage List[8]. Both compounded and brand-name prescriptions are generally FSA/HSA eligible under IRS Publication 502[9]. Prices may vary based on dose and promo availability.

ProviderStarting Price
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AM Rx$25/moVisit
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JRNYS$89/moVisit
Lavender Sky Health$95/moVisit
Fidelity Medical Clinic$99/moVisit
Fifty 410$99/moVisit
Joi + Blokes$99/moVisit
Jyra Health$99/moVisit
Live Vital$99/moVisit
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Luci$99/moVisit
Framework$100/moVisit
Kongo$119/moVisit
Levers Health$123/moVisit
LumiMeds$133/moVisit
Luma Meds$140/moVisit
Ivologist$145/moVisit
Kin Meds$146/moVisit
Jently$149/moVisit
JustAnswer Weight Loss$149.97/moVisit
LevelUp Rx$149.97/moVisit
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LeanDose$159/moVisit
Fella Health$165/moVisit
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FitRx$25/moVisit
Curex$49/moVisit
Enhance MD$49/moVisit
Bliv$58/moVisit
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Boston Medical Group$66/moVisit
Green Cap Health$79/moVisit
boostAGErx$95/moVisit
Alan Meds$99/moVisit
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Care Clinics$100/moVisit
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Elara Health and Wellness$117/moVisit
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Semaglutide Head-to-Head Comparisons

Short-form verdict pages comparing Semaglutide to other GLP-1 options with trial-anchored data, FDA-label dosing, and current manufacturer pricing.

Semaglutide vs Tirzepatide
SURMOUNT-5 head-to-head: tirzepatide -20.2% body weight vs semaglutide -13.7% at 72 weeks. Semaglutide wins on CV outcomes (SELECT -20% MACE). Compare mechanisms and access.
Last verified 2026-05-27
Semaglutide vs Ozempic
Rybelsus is oral semaglutide (3/7/14 mg daily); Ozempic is injectable semaglutide (0.25-2 mg weekly). Same molecule — oral bioavailability ~1% means injection delivers more drug.
Last verified 2026-05-27
Semaglutide vs Foundayo
Foundayo (orforglipron) is the first non-peptide oral GLP-1 — no food restriction, 11-12% weight loss in ATTAIN-1. Rybelsus is oral semaglutide — strict 30-min fast, T2D-only.
Last verified 2026-05-27

See all drug-vs-drug verdicts.

Pivotal Semaglutide Trial Walkthroughs

Endpoint-by-endpoint breakdowns of the trials that shaped the Semaglutide label, with primary-source numbers and FAQs.

STEP-1
STEP-1 is the pivotal NEJM trial that established once-weekly semaglutide 2.4 mg as a category-defining obesity drug. This deep-dive walks through every reported endpoint — body weight, waist, blood pressure, hs-CRP, HbA1c, IWQOL-Lite-CT, SF-36 — with the actual numbers from the Wilding 2021 publication and the ClinicalTrials.gov results posting, plus adverse-event incidence and FAQs about run-in, dose tolerance, and durability after treatment ends.
Phase 3 · N=1,961 · Last verified 2026-05-27
SELECT
SELECT (Lincoff 2023, NEJM, PMID 37952131) was the first cardiovascular-outcomes trial of a GLP-1 receptor agonist run in adults with obesity but no diabetes. Across 17,604 participants followed a mean 39.8 months, weekly semaglutide 2.4 mg reduced the primary three-point MACE composite by 20% versus placebo. The result moved semaglutide from a weight-loss drug into the cardioprotection conversation and underpinned Wegovy's March 2024 FDA label expansion to reduce MACE risk in adults with obesity and established cardiovascular disease.
3 · N=17,604 · Last verified 2026-05-27
SURMOUNT-5
SURMOUNT-5 is the first and only randomized head-to-head trial comparing tirzepatide (Zepbound) with semaglutide (Wegovy) in adults with obesity but without type 2 diabetes. Eli Lilly randomized 751 participants 1:1 to the maximum tolerated dose of tirzepatide (10 mg or 15 mg) or the maximum tolerated dose of semaglutide (1.7 mg or 2.4 mg) for 72 weeks. The least-squares mean weight loss was −20.2% with tirzepatide vs −13.7% with semaglutide (P<0.001), a 6.5-percentage-point advantage. Tirzepatide also produced a larger waist-circumference reduction (−18.4 cm vs −13.0 cm) and roughly double the proportion of participants reaching ≥25% weight loss (36.5% vs 18.6%). Gastrointestinal adverse-event profiles were broadly similar, with vomiting and GERD numerically less common on tirzepatide and injection-site reactions more common.
Phase 3b · N=751 · Last verified 2026-05-27
SURPASS-2
SURPASS-2 (Frias 2021 NEJM, PMID 34170647) is the first registrational head-to-head comparison of two incretin agonists. 1,879 adults with type 2 diabetes inadequately controlled on metformin were randomized to once-weekly subcutaneous tirzepatide 5 mg, 10 mg, 15 mg, or semaglutide 1 mg for 40 weeks. Tirzepatide produced larger reductions in HbA1c (−2.01 to −2.30 percentage points vs −1.86 with semaglutide) and in body weight (−7.6 to −11.2 kg vs −5.7 kg) across every dose, with a similar GI-event profile and low hypoglycemia in both groups. The trial supplied the regulatory case that dual GIP/GLP-1 agonism delivers more glycemic and weight effect per dose than the leading GLP-1 monotherapy at its highest then-approved T2D dose.
Phase 3 · N=1,879 · Last verified 2026-05-27

Semaglutide Patient Questions, Answered

Real patient questions about Semaglutide pulled from named subreddits and answered with peer-reviewed trial data.

Top 10 Semaglutide Side-Effect Questions from Reddit, Answered
10 questions · 15 PubMed citations
Last verified 2026-05-27
Top 10 Compounded vs Brand GLP-1 Questions from Reddit, Answered
10 questions · 10 PubMed citations
Last verified 2026-05-27
Top 10 Oral GLP-1 Questions from Reddit, Answered with Trial Data
10 questions · 10 PubMed citations
Last verified 2026-05-28

Semaglutide Reference Cards

Scannable cheat sheets for dose schedules, missed-dose rules, and red-flag side effects — every number verified against the DailyMed FDA label.

Wegovy Dose Ladder (2026 Cheat Sheet)
FDA-label Wegovy titration on one page — 5 step doses, recommended week-to-week timing, missed-dose protocol, and the side-effect red flags that mean call your doctor. DailyMed-sourced, current 2026.
4 min read · Last verified 2026-05-27
Ozempic Missed Dose: 5-Day Rule Cheat Sheet (2026)
Ozempic is once-weekly semaglutide. The FDA label gives a clean rule for missed doses, anchored to a 5-day window from the originally scheduled injection day. This cheat sheet condenses that rule, the 48-hour spacing limit, restart protocol after a long gap, and the side-effect red flags onto one scannable page. DailyMed-sourced, current 2026.
4 min read · Last verified 2026-05-27
GLP-1 Sick-Day Guide (2026 Cheat Sheet)
Flu, stomach bug, surgery, dehydration &mdash; should you hold your Wegovy, Ozempic, Zepbound, or Mounjaro? Decision table by situation, restart-after-illness protocol, and red-flag symptoms on one scannable page.
4 min read · Last verified 2026-05-28
GLP-1 Injection Site Rotation: 8-Week Cheat Sheet (2026)
Wegovy, Ozempic, Zepbound, and Mounjaro all share the same three FDA-approved injection sites: abdomen, front of thigh, and back of upper arm. Reusing the same spot week after week causes lipohypertrophy &mdash; thickened fatty tissue that absorbs the drug erratically, leaving appetite suppression and weight-loss results inconsistent. This cheat sheet maps the approved sites, gives an 8-week rotation example, and lists the technique mistakes that send users back to the prescriber.
4 min read · Last verified 2026-05-28

Ranked PubMed Studies on Semaglutide

Curated lists of the highest-impact peer-reviewed studies on Semaglutide and related GLP-1 drugs. Every PMID live-verified via PubMed esummary.

Top 10 PubMed Studies on Semaglutide for Weight Loss (2026)
Ten peer-reviewed semaglutide weight-loss studies anchored to the STEP program (STEP-1 to STEP-8, STEP-TEENS, STEP-HFpEF), the SELECT cardiovascular outcomes trial, and OASIS-1 high-dose oral. Each entry includes the PMID, trial design, primary endpoint, and editorial summary.
10 ranked papers · Last verified 2026-05-27
Top 10 PubMed Studies on Tirzepatide for Weight Loss (2026)
Ten peer-reviewed tirzepatide weight-loss studies anchored to the SURMOUNT program (SURMOUNT-1 through SURMOUNT-5, plus SURMOUNT-CN and SURMOUNT-OSA), the SYNERGY-NASH liver-fibrosis trial, the SUMMIT HFpEF trial, and the SURPASS-2 head-to-head against semaglutide. Each entry includes the PMID, trial design, primary endpoint, and editorial summary.
10 ranked papers · Last verified 2026-05-27
Top 10 PubMed Studies on GLP-1 Cardiovascular Outcomes (2026)
Ten landmark cardiovascular outcomes trials that established GLP-1 receptor agonists as cardioprotective drugs beyond glycemic control. Covers MACE reduction in type 2 diabetes (LEADER, SUSTAIN-6, REWIND, HARMONY OUTCOMES, AMPLITUDE-O, PIONEER 6), the SELECT paradigm-shift in obesity without diabetes, kidney outcomes in FLOW, heart failure in STEP-HFpEF, and the foundational neutral ELIXA post-ACS trial. Each entry includes the PMID, NCT, primary endpoint, and editorial summary.
10 ranked papers · Last verified 2026-05-27
Top 10 PubMed Studies on GLP-1 Receptor Agonists for Kidney Disease (2026)
Ten peer-reviewed studies that built the kidney-outcomes case for GLP-1 receptor agonists. FLOW (2024) is the only dedicated CKD pivotal trial and drove the January 2025 FDA kidney label for Ozempic. The other nine are renal-endpoint analyses from major cardiovascular outcomes trials (LEADER, REWIND, SUSTAIN-6, AMPLITUDE-O, ELIXA, SURPASS-4), the AWARD-7 dedicated moderate-to-severe CKD trial in dulaglutide, the FLOW SGLT2 interaction analysis, and a Lancet class-level meta-analysis. Each entry includes PMID, NCT, primary endpoint, and editorial summary.
10 ranked papers · Last verified 2026-05-27

Related Research on Semaglutide

Deep-dive articles from our research desk with primary-source trial data, FDA label verification, and editorial analysis.

Ozempic Legs: Loose Skin, Muscle Loss, and Leg Changes Explained
What 'Ozempic legs' actually are — subcutaneous fat loss, lean-mass reduction, and loose/saggy skin that make legs look thinner, older, hollow, or veiny after GLP-1 weight loss — who's most at risk, and how to prevent and manage it.
9 min read4 citations
First Signs Ozempic Is Working: Early Indicators a GLP-1 Is Taking Effect
How to know if Ozempic is working — the early signs that appear in the first 1–2 weeks (reduced food noise, earlier satiety, smaller portions, mild GI effects) and what meaningful weight loss actually looks like as the dose titrates up.
8 min read4 citations
Ozempic Muscle Cramps: Electrolytes, Dehydration, and What Helps
Muscle cramps on Ozempic are not a direct GLP-1 effect. The credible mechanism is secondary: reduced intake, GI fluid losses (vomiting, diarrhea), and rapid weight loss shift electrolytes. Evidence, honest framing, and what helps.
9 min read3 citations
Endoscopic Sleeve Gastroplasty (ESG): The Evidence vs GLP-1s and Surgery
Endoscopic sleeve gastroplasty (ESG) is an incisionless stomach-tightening procedure that produced 13.6% weight loss in the MERIT randomized trial - on par with semaglutide, below tirzepatide and surgery. The honest evidence on efficacy, safety, cost, reversibility, and how it compares to a GLP-1.
12 min read12 citations
Gastric Balloon vs GLP-1: Which Wins on Weight Loss, Durability, and Safety?
No head-to-head trial exists, but the shape is clear: a temporary 6-month gastric balloon delivers ~7-15% weight loss that partly reverses after removal, versus a GLP-1's ongoing ~15-21% sustained while taken. The balloon also carries FDA death reports a GLP-1 does not. For most people a GLP-1 or ESG is stronger; the balloon's niche is a short-term jump-start.
10 min read7 citations
ESG vs GLP-1 (Semaglutide and Tirzepatide): The Head-to-Head Evidence
A one-time incisionless procedure or a weekly injection for life? ESG produced ~13.6-16% weight loss vs ~14.9% for semaglutide and ~20.9% for tirzepatide, but no head-to-head trial exists. Efficacy, durability, cost over time, risk, and the combination that beats either alone.
12 min read6 citations

Frequently Asked Questions

Sources & methodology — as of July 2026
  1. 1.FDA — Wegovy (semaglutide) Approval History via Drugs@FDA— U.S. Food & Drug Administration.
  2. 2.FDA — Ozempic (semaglutide) Prescribing Information via Drugs@FDA— U.S. Food & Drug Administration.
  3. 3.STEP 1 Trial — Once-Weekly Semaglutide in Adults with Overweight or Obesity (Wilding JPH et al.)— New England Journal of Medicine.PMID: 33567185.
  4. 4.SURMOUNT-5 Trial — Tirzepatide vs. Semaglutide Head-to-Head in Obesity (Garvey WT et al.)— New England Journal of Medicine.PMID: 40334173.
  5. 5.SELECT Trial — Semaglutide and Cardiovascular Outcomes in Obesity without Diabetes (Lincoff AM et al.)— New England Journal of Medicine.PMID: 37952131.
  6. 6.ADA — Standards of Care in Diabetes (2025)— American Diabetes Association.
  7. 7.FDA — Compounding and the 503A Pharmacy Framework— U.S. Food & Drug Administration.
  8. 8.FDA — Drug Shortages Database (current shortage listings)— U.S. Food & Drug Administration.
  9. 9.IRS Publication 502 — Medical and Dental Expenses (HSA/FSA eligibility)— Internal Revenue Service.

Key terms, explained

New to GLP-1s? Tap any term for a quick, plain-English definition.