how long does an unopened vial of tirzepatide last a Last? Tirzepatide Calculator – Calculate Dosage

Learn more: Zepbound costs in 2025: With and without insurance coverage Tirzepatide: Dosage and how to take it Tirzepatide is a once-weekly injection that you give yourself just under the skin

Week 21+: 15mg once weekly

If you mean: most established and widely used the answer is semaglutide

Common side effects include nausea, vomiting, diarrhea, and injection site reactions

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Common effects include nausea, vomiting, diarrhea, and constipation, most of which resolve within 1-2 weeks or improve with slow dose titration