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Starting a GLP-1, thoughtfully
Everything I want to talk through with a clinician before starting a GLP-1, plus the basics I keep reading I should not skip.
SemaglutideTirzepatidePsylliumCreatine monohydrateVitamin D
No. 001medication
Semaglutide
Semaglutide is a medication that is FDA-approved, prescription only.
Also known as Wegovy, Ozempic, Rybelsus, Wegovy pill, GLP-1
Semaglutide mimics GLP-1, a gut hormone that slows stomach emptying and signals fullness. It is sold as Wegovy (weekly injection and, since December 2025, a daily pill) for chronic weight management and as Ozempic and Rybelsus for type 2 diabetes. It is one of the most searched medications in the US.
In 1 example journal
Is Semaglutide FDA-approved?
Approved by the FDA. A licensed clinician has to decide it is right for you and prescribe it. FDA-approved, prescription only. FDA took semaglutide off its shortage list in February 2025, which ended the basis for mass compounding; in April 2026 FDA proposed excluding it from the 503B outsourcing bulks list, and it says compounded versions should only be used when an approved drug cannot meet a patient's need.
As of September 23, 2026.
Key takeaways
- Semaglutide is an FDA-approved GLP-1 medication that lowers appetite. It comes as a weekly injection (Wegovy, Ozempic) and as a pill (Wegovy pill, Rybelsus).
- In the STEP 1 trial, participants lost about 15% of their body weight on average over 68 weeks, compared with about 2% on placebo.
- Most people regain much of the weight after stopping, so guidelines treat it as a long-term medication.
- Medical groups and FDA advise using FDA-approved versions rather than compounded ones when you can.
How does Semaglutide work?
Semaglutide is a lab-made version of GLP-1, a hormone your gut releases after you eat. It acts on GLP-1 receptors in the brain areas that control appetite, so you feel full sooner and think about food less. It also slows how fast your stomach empties.
In people with type 2 diabetes, the same receptor helps the pancreas release insulin when blood sugar is high. That is why Ozempic and Rybelsus are diabetes drugs, and Wegovy is the version approved for weight.
What does the evidence say about Semaglutide?
Strong human evidenceLarge randomized trials (the STEP program) show meaningful average weight loss versus placebo, and the drug has years of post-marketing safety data.
What to expect
What trials and prescribing information measured over time. Everyone responds differently.
- First months
The label starts low and raises the dose gradually over several months. Nausea, diarrhea and vomiting were most often reported during this step-up period and usually eased.
- Week 4 onward
In STEP 1, average weight loss was measurable from the first check-in at week 4.
- Around week 60
In STEP 1, average weight loss reached its lowest point around week 60 and then leveled off. At week 68, participants had lost about 15% of body weight on average, versus about 2% on placebo.
- If you stop
In the STEP 1 extension, people regained about two-thirds of the weight they had lost within a year of stopping. In STEP 4, those switched to placebo regained weight while those who continued kept losing.
What do clinicians say about Semaglutide?
Diabetes and obesity guidelines now place GLP-1 medications near the front of treatment for people with obesity and weight-related conditions. They also stress long-term use, muscle-preserving nutrition, and FDA-approved products.
The ADA 2026 Standards of Care say obesity medication should be offered as part of first treatment for people who already have a weight-related condition, and prefer GLP-1 or dual GIP/GLP-1 drugs for people with type 2 diabetes.
ADA Standards of Care 2026, Section 8: Obesity and weight management (Guideline Central summary)The ADA advises continuing obesity medication after goals are reached, because stopping often brings weight back and cardiometabolic risks can return.
ADA Standards of Care 2026, Section 8: Obesity and weight management (Guideline Central summary)The AGA 2022 guideline recommends adding medication to lifestyle changes for adults with a BMI of 30 or more, or 27 or more with a weight-related complication, when lifestyle changes alone have not been enough, and suggests semaglutide as an option.
AGA clinical practice guideline on pharmacological interventions for obesity (2022)A 2025 joint advisory from four nutrition and obesity societies urges enough protein and resistance training to help keep muscle during GLP-1 treatment, plus small meals and fluids to manage GI symptoms.
ACLM, ASN, OMA and TOS joint advisory: nutrition priorities during GLP-1 therapy (Obesity, 2025)In the SELECT trial of adults with heart disease and overweight but no diabetes, heart attacks, strokes and cardiovascular deaths were about 20% less common with semaglutide than placebo.
SELECT: Semaglutide and cardiovascular outcomes in obesity without diabetes (NEJM 2023)FDA says compounded and unapproved GLP-1s get no FDA review for safety, quality or effectiveness, and has logged dosing errors and hospitalizations with compounded semaglutide. The ADA and the Obesity Medicine Association also advise against compounded versions.
FDA: Concerns with unapproved GLP-1 drugs used for weight loss
Summaries of published guidelines, drug labels, regulators and reviews, each attributed to its source. DiscoverMedica does not employ clinicians.
Is Semaglutide right for you, and who should avoid it?
Often considered for
- Adults with a BMI of 30 or more (Wegovy label)
- Adults with a BMI of 27 or more plus at least one weight-related condition, such as high blood pressure, type 2 diabetes or high cholesterol
- Adults with heart disease and overweight or obesity, to lower the risk of heart attack and stroke
- Teens 12 and older with obesity (injection)
- Ozempic and Rybelsus: adults with type 2 diabetes
Not a fit, or needs extra care
- Anyone with a personal or family history of medullary thyroid cancer, or multiple endocrine neoplasia type 2 (MEN 2)
- Pregnancy, or planning pregnancy soon: the label says to stop at least two months before trying to conceive
- Anyone who has had a serious allergic reaction to semaglutide
- People with a history of pancreatitis, gallbladder disease, severe GI disease or diabetic eye disease need a careful conversation first
- Anyone already taking another GLP-1 medication
Only a licensed clinician who knows your history can decide whether it is right for you.
What are the risks and side effects of Semaglutide?
- Boxed warning: thyroid C-cell tumors in rodents. Not for people with a personal or family history of medullary thyroid cancer or MEN 2.
- Nausea, vomiting, diarrhea and constipation are common, especially early on; dehydration from GI side effects can strain the kidneys.
- Label warnings include pancreatitis, gallbladder disease, low blood sugar when combined with insulin or sulfonylureas, and diabetic eye complications.
- Not for use in pregnancy. Tell any anesthesiologist you take it, because slowed stomach emptying matters before sedation.
- FDA has logged hundreds of adverse event reports tied to compounded semaglutide, many from dosing errors and some from counterfeit or mislabeled products.
What should you ask a clinician about Semaglutide?
- Am I a candidate for the injection or the pill, and does my insurance cover either?
- How should my other diabetes or blood pressure medications change?
- What should I do if I cannot keep food or fluids down?
These save with the compound when you add it to My Journal, so they’re on the printout for your visit.
How do people get Semaglutide through telehealth?
Answer an online health questionnaire about your weight history, conditions and medications.
A licensed clinician reviews it. Depending on your state and the program, that is either an asynchronous review or a short video or phone visit.
Some programs ask for recent labs, or send an at-home kit, before or soon after prescribing.
If prescribed, the medication ships to you or is sent to a local pharmacy. Branded pens covered by insurance usually need a prior authorization first.
Follow-ups happen by message or visit as your clinician adjusts treatment, typically monthly early on.
Labs you may be asked for
- A metabolic panel (kidney and liver function)
- A1C or fasting glucose
- A lipid panel
- Thyroid tests at some programs
- Many programs accept results from the past year instead of new tests
What programs often include
- Clinician review and ongoing prescription management
- Messaging with the care team about side effects and dose changes
- Nutrition coaching or registered dietitian support at some programs
- Insurance and prior-authorization help at programs that take insurance
Check your levels first
Some services let you order common lab tests yourself, so the results are ready for your visit. Your clinician decides which labs, if any, you need, and what the results mean.
- Function HealthAnnual membership for broad lab panels, drawn at Quest sites or at home.Visit
- Quest HealthOrder individual lab tests from Quest Diagnostics online, without a doctor’s visit.Visit
From each service’s own site, checked September 23, 2026.
How some providers do it
- RoOnline questionnaire with no in-person visit; the membership includes provider messaging, an insurance concierge with prior-authorization help, and 1:1 coaching. A provider may ask for an at-home metabolic lab test.
- HimsBranded medication only, with a required weight-loss membership. Depending on your state, treatment may be decided without a video visit; follow-ups happen by message.
- LifeMDLabs are encouraged but not required before the first prescription, and recent results can count. Accepts insurance and Medicare; prescriptions go to a local pharmacy first.
- Mochi HealthLive online visits with a physician and a nutrition provider; the insurance team helps with prior authorizations. Sells both branded and compounded options.
- NurxAsynchronous review by a licensed provider, a check-in about two weeks after starting, and branded pens picked up at a local pharmacy.
- Amazon PharmacyDoes not prescribe. It fills a prescription from your own clinician and accepts most insurance.
From each provider’s own site, checked September 23, 2026. Programs change, so confirm the details before you sign up.
Where can I get Semaglutide?
24 providers list Semaglutide on DiscoverMedica, lowest listed price first.
Mochi HealthCompounded semaglutide weekly injection
Compounded, not FDA-approvedLowest listed priceClinician consult required
From $60listed price†
Start at Mochi Health From $62listed price†
Start at Mochi Health Starting at $75/mo + program feelisted price†
Start at Ivim Health $99/molisted price†
Start at Eden Strut HealthCompounded semaglutide (injection or oral lozenge)
Compounded, not FDA-approvedClinician consult required
$129/molisted price†
Start at Strut Health From $149/molisted price†
Start at Hers From $149/molisted price†
Start at Hims Starting at $149/molisted price†
Start at NovoCare Pharmacy $149/molisted price†
Start at Ro From $149.99listed price†
Start at Maximus Henry MedsCompounded GLP-1 program (semaglutide)
Compounded, not FDA-approvedClinician consult required
$179/molisted price†
Start at Henry Meds From $199/molisted price†
Start at Hims From $199listed price†
Start at LifeMD From $199listed price†
Start at Mochi Health Starting at $199/molisted price†
Start at NovoCare Pharmacy $199/mo for first two months, then $399/molisted price†
Start at PlushCare $199/mo introductorylisted price†
Start at TrumpRx $199/mo introductorylisted price†
Start at TrumpRx $299/mo + $49/mo membershiplisted price†
Start at Lemonaid Health $499 per monthlisted price†
Start at Rex MD Noom MedNoom Microdose GLP-1Rx (compounded semaglutide)
Compounded, not FDA-approvedClinician consult required
Plans start at $791listed price†
Start at Noom Med see site
Start at Amazon Pharmacy see site
Start at Amazon Pharmacy see site
Start at Amazon Pharmacy see site
Start at Amazon Pharmacy see site
Start at Found see site
Start at Healthspan see site
Start at NovoCare Pharmacy see site
Start at Nurx see site
Start at Ro see site
Start at WeightWatchers Med+ † Prices as listed by the provider when we checked; they change.
How much does Semaglutide cost?
Listed prices run from $75 to $299 a month across 12 providers, as checked October 7, 2026.
Prices as listed by the provider when we checked; they change. Membership or consult fees may be separate; see each provider.
Compare and learn
- Tirzepatide vs semaglutide: how do Zepbound and Mounjaro compare with Wegovy and Ozempic?
- Semaglutide vs liraglutide: how do Wegovy and Ozempic compare with Saxenda and Victoza?
- Cagrilintide vs semaglutide: what is CagriSema, and how do they compare?
- Compounded tirzepatide and semaglutide: how do they differ from the brands?
- How do telehealth prescriptions work?
- What are peptides, what is peptide therapy, and are peptides legal?
- Peptides for weight loss: which are approved, and which are not?
- FDA approved, FDA cleared or compounded: what is the difference?
- How much does Wegovy cost without insurance?
- Wegovy pill vs injection: what is the difference?
Semaglutide: questions, answered
What is the difference between Wegovy and Ozempic?
Both contain semaglutide. Wegovy is approved for weight management and heart risk reduction. Ozempic is approved for type 2 diabetes. They come in different dose ranges, and insurance treats them differently.
How much weight do people lose?
In the STEP 1 trial, participants lost about 15% of their body weight on average over 68 weeks, compared with about 2% on placebo. That is an average. Some people lost much more, and some lost little.
What happens if I stop taking it?
Most people regain weight. In the STEP 1 extension, participants had regained about two-thirds of the lost weight a year after stopping. Guidelines treat it as a long-term medication.
Is compounded semaglutide the same thing?
No. Compounded versions are not FDA-approved or FDA-reviewed, and FDA has reported dosing errors and hospitalizations linked to them. FDA and several medical societies advise using the approved product when it is available.
Will it make me lose muscle?
Some of the weight lost on any weight-loss treatment is lean mass. Nutrition societies advise enough protein and regular strength training to help protect muscle.
Can I get it through telehealth?
Yes. Many licensed telehealth providers prescribe it after an online intake and clinician review. Some take insurance, and some are cash-pay only.
Important safety information
Key risks
- Boxed warning: thyroid C-cell tumors in rodents. Not for people with a personal or family history of medullary thyroid cancer or MEN 2.
- Nausea, vomiting, diarrhea and constipation are common, especially early on; dehydration from GI side effects can strain the kidneys.
- Label warnings include pancreatitis, gallbladder disease, low blood sugar when combined with insulin or sulfonylureas, and diabetic eye complications.
- Not for use in pregnancy. Tell any anesthesiologist you take it, because slowed stomach emptying matters before sedation.
- FDA has logged hundreds of adverse event reports tied to compounded semaglutide, many from dosing errors and some from counterfeit or mislabeled products.
Talk to a clinician first, or avoid it, if
- Anyone with a personal or family history of medullary thyroid cancer, or multiple endocrine neoplasia type 2 (MEN 2)
- Pregnancy, or planning pregnancy soon: the label says to stop at least two months before trying to conceive
- Anyone who has had a serious allergic reaction to semaglutide
- People with a history of pancreatitis, gallbladder disease, severe GI disease or diabetic eye disease need a careful conversation first
- Anyone already taking another GLP-1 medication
This is not a complete list of risks. Read the full prescribing information and any Medication Guide, and talk to a licensed clinician or pharmacist about your own situation. If you have a severe reaction, call 911. You can report side effects to the FDA through MedWatch at 1-800-FDA-1088.
Sources
- DailyMed: Wegovy prescribing information
- STEP 1: Once-weekly semaglutide in adults with overweight or obesity (NEJM 2021)
- FDA: Concerns with unapproved GLP-1 drugs used for weight loss
Also checked for this guide
- DailyMed: Wegovy (semaglutide) prescribing information, revised June 2026
- STEP 4: Continued semaglutide vs switch to placebo on weight maintenance (JAMA 2021)
- STEP 1 extension: weight regain after stopping semaglutide (Diabetes Obes Metab 2022)
- SELECT: Semaglutide and cardiovascular outcomes in obesity without diabetes (NEJM 2023)
- ADA Standards of Care 2026, Section 8: Obesity and weight management (Guideline Central summary)
- AGA clinical practice guideline on pharmacological interventions for obesity (2022)
- ACLM, ASN, OMA and TOS joint advisory: nutrition priorities during GLP-1 therapy (Obesity, 2025)
- Obesity Medicine Association, The Obesity Society and Obesity Action Coalition: statement on compounded GLP-1s (Jan 2024)
- FDA (Mar 2026): FDA warns 30 telehealth companies about marketing of compounded GLP-1s
- FDA (Apr 30, 2026): Proposal to exclude semaglutide, tirzepatide and liraglutide from the 503B bulks list
- Ro: Weight loss, how it works
- Hims: Weight loss
- Hims: Weight loss FAQ
- LifeMD: Weight management
- Mochi Health: FAQs
- Nurx: Weight management
- Amazon Pharmacy
Guide reviewed September 23, 2026.
Educational information only, not medical advice. It does not replace a conversation with a licensed clinician.
Example journals
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