- Nausea: roughly 40-44% of patients, mainly in the first weeks and after dose increases
- Diarrhea: about 30%
- Vomiting: around 25%
- Constipation: about 24%
What side effects are most common on semaglutide?
Digestive symptoms are the most common semaglutide side effects by a wide margin. In the STEP trials:
Our 2 favorite GLP-1 providers
The two providers our editors recommend first, with the same checked prices and scores used in our full ranking.
Our Most Popular
1
Exceptional
9.8out of 10
Semaglutide from $69/mo, delivered in 1-2 days
Refund if not approvedFree expedited shipping
Treatments offered
Compounded semaglutide injection (GLP-1) · Compounded tirzepatide injection (GLP-1 + GIP) · Online doctor review and prescription · Dose changes through the patient portal
Starting price
$79$69/month
*Compounded medications are not FDA-approved.
- Semaglutide $69/mo; tirzepatide $119/mo
- 5-minute questionnaire; doctor review usually within 24 hours
- Free 1-2 day shipping: cold-packed, tracked and insured
- No insurance, no clinic visits, cancel anytime
Pricing starts at
from $69/month
embody prescribes compounded semaglutide at $69/mo and tirzepatide at $119/mo online, ships in 1-2 days, and requires no insurance. Trustpilot: 3.8 from 9,604 reviews.
Read full embody review2
Exceptional
9.7out of 10
Low-cost GLP-1 care: semaglutide from $89/mo
Clear, flat pricingNo insurance needed
Treatments offered
Compounded semaglutide injection (GLP-1) · Compounded tirzepatide injection (GLP-1 + GIP) · Brand-name Ozempic, Zepbound and Wegovy · Once-weekly injection schedule
Starting price
$199$89/month
*Compounded medications are not FDA-approved.
- Semaglutide from $89/mo; tirzepatide from $149/mo
- Brand-name Ozempic, Zepbound and Wegovy available
- Reviewed by a physician, PA or nurse practitioner
- Free shipping, arriving in about 5-7 days
Pricing starts at
from $89/month
altRx sells compounded semaglutide from $89/month and tirzepatide from $149/month at a flat price per dose, plus brand-name Ozempic, Zepbound and Wegovy. Self-pay, no insurance needed.
Read full altRx reviewHow soon do semaglutide side effects begin?
Side effects usually appear within the first week of starting semaglutide or of moving to a higher dose. Symptoms are strongest in the first two to four weeks on any new dose, and by weeks four to six at a steady dose most patients report a clear improvement.
That is the reason for the slow titration schedule that starts at a low dose: it gives the body time to adapt. Our first month guide has a week-by-week timeline.
That is the reason for the slow titration schedule that starts at a low dose: it gives the body time to adapt. Our first month guide has a week-by-week timeline.
What helps with nausea on semaglutide?
Nausea is the top complaint, and several simple changes reduce it:
- Eat smaller meals more often instead of large plates.
- Skip greasy, fried or very spicy food, especially early on.
- Drink fluids through the day, since dehydration makes nausea worse.
- Choose bland, protein-rich foods.
- Try ginger tea, peppermint or a few crackers before meals.
Which semaglutide side effects are an emergency?
Seek medical care right away for:
- Severe abdominal pain that does not go away, a possible sign of pancreatitis
- Intense pain in the upper right abdomen, a possible gallbladder problem
- Swelling of the face, lips or tongue (allergic reaction)
- Changes in vision
Is GLP-1 Treatment Right for You?
GLP-1 medication is prescription-only: a licensed clinician has to decide it is appropriate, and it is not a fit for everyone. Side effects are possible, and they tend to show up in the first few weeks while your body adapts.
Results are usually best when the medication is paired with simple daily habits, such as balanced meals and regular movement.
For both safety and lasting progress, pick a provider that screens you properly before prescribing and keeps following up once treatment starts.
Which eating habits calm digestive side effects?
How you eat matters as much as what you eat when stomach emptying is slowed:
- Eat slowly. Rushing a meal makes nausea much worse.
- Stop at satisfied, not full.
- Pick lean protein and cooked vegetables over raw or very fibrous foods in the early weeks.
- Stay upright for at least 30 minutes after eating.
- For constipation, drink more water and consider a gentle fiber supplement.
Semaglutide plans and prices by provider
Each provider's published semaglutide plan, sorted from lowest price, with the terms listed under every price.
How long do semaglutide side effects last?
For most patients, side effects are worst in the first 2-4 weeks on a new dose and fade after that. After 4-6 weeks on a stable dose, GI symptoms are usually much milder or gone.
The start-low, raise-monthly schedule exists to shorten this adjustment period.
Some people barely notice side effects, while others need a slower ramp, and your provider can tailor the pace to how you respond. See the semaglutide timeline for week-by-week expectations.
Are tirzepatide side effects worse than semaglutide's?
Not meaningfully at comparable doses. Semaglutide and tirzepatide share a similar GI side effect profile.
Head-to-head comparisons suggest tirzepatide may cause slightly more of some symptoms at its top dose (15 mg), but tolerability is similar at matched doses.
Effectiveness and cost are better reasons to choose between them than side effects. Our Mounjaro vs Ozempic guide compares the two in full.
Why does provider oversight matter for side effects?
A qualified provider who monitors your treatment is essential. They can change your dose schedule, suggest ways to manage symptoms and catch warning signs early.
When choosing a telehealth weight loss provider, confirm that the program includes ongoing medical oversight, not only a first prescription. Regular check-ins and a care team you can actually reach often decide whether treatment feels rough or manageable. Compare providers that put clinical support first.
When choosing a telehealth weight loss provider, confirm that the program includes ongoing medical oversight, not only a first prescription. Regular check-ins and a care team you can actually reach often decide whether treatment feels rough or manageable. Compare providers that put clinical support first.
Should side effects keep you from starting semaglutide?
For most people, no: the side effects are temporary and manageable. Only a fairly small share of trial participants stopped because of side effects, so the large majority judged the benefits worth the discomfort.
Go in with realistic expectations, choose a good provider and use the strategies above. If you are unsure semaglutide suits you, read our eligibility guide or take our matching quiz to find a provider who can assess you.
Go in with realistic expectations, choose a good provider and use the strategies above. If you are unsure semaglutide suits you, read our eligibility guide or take our matching quiz to find a provider who can assess you.