GLP-1 / Weight Loss · United States

Semaglutide vs Tirzepatide:
The next generation of weight loss medications compared

A detailed breakdown for United States — including efficacy, cost, side effects, and how to get a prescription online.

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Semaglutide vs Tirzepatide — At a Glance

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Semaglutide

GLP-1 agonist

Approved forT2D + Weight management

DoseUp to 2.4mg/week (inj.)

Avg result~15%

Est. cost$199–$349/mo (telehealth)

Insurance (CA)Often (T2D indication)

✓ Pros

✓Longer track record

✓More coverage options

✓Oral form (Rybelsus) available

✓Strong safety data

✗ Cons

✗Lower average weight loss than tirzepatide

✗Single receptor mechanism

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Tirzepatide

GLP-1 + GIP dual agonist

Approved forT2D (Mounjaro) + Weight (Zepbound)

DoseUp to 15mg/week (inj.)

Avg result~20–22%

Est. cost$299–$399/mo (telehealth)

Insurance (CA)Limited in Canada

✓ Pros

✓Significantly higher weight loss

✓Dual mechanism targets two gut hormones

✓Impressive SURMOUNT trial results

✗ Cons

✗Newer — less long-term data

✗More expensive

✗Less insurance coverage currently

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Our Verdict

Tirzepatide achieves meaningfully higher weight loss (~20–22% vs ~15%) due to its dual GLP-1 + GIP mechanism. If maximum weight loss is the priority and cost/coverage is not a barrier, tirzepatide is the stronger option. Semaglutide remains excellent with a longer safety record and better coverage.

⚕️ This comparison is for informational purposes only. Consult a licensed physician before choosing any medication. Individual responses vary.

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Common Questions

Is tirzepatide better than semaglutide for weight loss?

Clinical data shows tirzepatide produces greater average weight loss (~20–22% vs ~15%). The SURMOUNT-1 trial demonstrated this superiority directly. However, individual responses vary significantly.

Is tirzepatide available in Canada?

Mounjaro (tirzepatide) received Health Canada approval for type 2 diabetes. It is available through some telehealth providers, though coverage remains limited compared to semaglutide.

What are the side effects of tirzepatide vs semaglutide?

Both share similar GI side effects (nausea, diarrhea, constipation). Tirzepatide's side effect profile is comparable based on clinical trial data, though it appears to be slightly better tolerated by some patients.