GLP-1 Comparisons Hub: Which Medication Is Right for You?

The GLP-1 medication landscape has expanded rapidly. From semaglutide (Ozempic/Wegovy) to tirzepatide (Mounjaro/Zepbound) to the emerging retatrutide, understanding the differences is essential. This hub provides head-to-head comparisons across every dimension that matters.

The Three Main Contenders

Efficacy Comparison

Weight Loss

In head-to-head trials (SURPASS-2), tirzepatide at all dose levels produced greater weight loss than semaglutide 1mg. The SURMOUNT-1 trial showed up to 22.5% body weight reduction with tirzepatide 15mg over 72 weeks. Semaglutide 2.4mg (STEP 1) achieved approximately 14.9% over 68 weeks. Retatrutide Phase 2 data showed up to 24.2% weight loss, but Phase 3 results are pending.

Blood Sugar Control

Both semaglutide and tirzepatide significantly reduce HbA1c. Tirzepatide showed slightly greater HbA1c reduction in SURPASS-2 (2.0-2.3% vs 1.9% for semaglutide 1mg). Both have led to diabetes remission in a meaningful percentage of patients.

Cardiovascular Benefits

Semaglutide has the strongest cardiovascular evidence. The SELECT trial demonstrated a 20% reduction in major adverse cardiovascular events. Tirzepatide's cardiovascular outcomes trial (SURPASS-CVOT) is ongoing. Retatrutide does not yet have cardiovascular outcome data.

Side Effect Comparison

All three medications share similar gastrointestinal side effects (nausea, diarrhea, constipation, vomiting), but at different rates. Generally, tirzepatide has shown slightly lower nausea rates than semaglutide in comparable trials, possibly due to the GIP component buffering GLP-1-related nausea.

For detailed side-by-side comparisons of specific side effects, see our micro-comparison articles:

• Semaglutide vs Tirzepatide for Nausea
• Semaglutide vs Tirzepatide for Hair Loss
• Semaglutide vs Tirzepatide for Belly Fat
• Semaglutide vs Tirzepatide for Brain Fog

Cost Comparison

Cost is often the deciding factor. Brand-name GLP-1 medications run $1,000-$1,350 per month without insurance. Insurance coverage is inconsistent and often requires prior authorization. Compounded alternatives offer the same active ingredients at a fraction of the cost:

Which Medication Is Best For You?

Choose Semaglutide If:

• Budget is a primary concern ($99/mo is the most affordable option)
• You have cardiovascular disease or high cardiovascular risk (strongest CV outcome data)
• You want the most established medication with the longest track record
• Your provider recommends it based on your health profile

Choose Tirzepatide If:

• Maximum weight loss is your primary goal
• You have tried semaglutide and hit a plateau
• You want potentially lower nausea risk
• You have type 2 diabetes (excellent blood sugar control)
• Budget allows $125/mo

Consider Retatrutide If:

• You want the newest, most potent option (when available)
• Previous GLP-1 medications have not produced adequate results
• You understand it is newer with less long-term data

Switching Between Medications

Switching from semaglutide to tirzepatide (or vice versa) is common and generally straightforward. Your provider will determine an equivalent starting dose on the new medication and may include a brief overlap or gap period. See our detailed guide on switching GLP-1 medications.

Frequently Asked Questions