Semaglutide vs Tirzepatide: Which Weight Loss Medication Is Right for You

Side effects: what to expect

Both drugs cause gastrointestinal side effects early on. Nausea, diarrhea, constipation, and feeling full after eating very little are among the most common. These usually decrease after the first few weeks as the body adjusts.

In direct comparison, Tirzepatide tends to have slightly higher rates of early side effects than Semaglutide, especially nausea. But this varies widely from person to person.

People who logged early side effects in the PeptPro app can show their doctor exactly what happened, on which days, and at what dose. That makes dose adjustment much more straightforward. Check out the app here.

Dosing and injection frequency

Semaglutide is available as Ozempic (weekly injection) and Wegovy (also weekly, with higher dose options). The dose is gradually adjusted over weeks.

Tirzepatide is sold as Mounjaro and follows the same principle: weekly subcutaneous injection with progressive dose adjustment. Both require commitment to continuous use. The medication only works while you are taking it.

Cost and access

This is a point that heavily influences the decision. Tirzepatide tends to be more expensive than Semaglutide depending on the pharmacy and location. Checking the current price, generic options, and patient assistance programs is a step many people skip.

PeptPro does not solve the cost issue, but it helps you track whether the results are justifying the investment. When you have progress data in the app, the conversation with your doctor about continuing or adjusting becomes much more concrete. Start here.

What to bring to your appointment

Before deciding, gather as much information as possible. This includes recent lab results, list of current medications, history of previous weight loss attempts, and if you have already tried a GLP-1, how that experience went.

In PeptPro you can log dose, date, weight, and symptoms at each injection. This history transforms a generic conversation with your doctor into a decision grounded in real data. Download the app and start tracking today.

The choice between Semaglutide and Tirzepatide is personal and medical. Both work. What matters is which one makes more sense for your situation, with proper follow-up and realistic expectations.