Treat diarrhea as an expected side effect of GLP-1 medications, and plan for it before your first dose. If you are weighing treatment in St. Augustine, the two sources below agree on this point.
What the sources print
Harvard Health says gastrointestinal symptoms, meaning nausea, vomiting, diarrhea, and constipation, are by far the most common side effects of GLP-1 drugs. The NHS lists diarrhoea among the common side effects of semaglutide, next to feeling sick, being sick, constipation, and feeling tired.
Neither line tells you how it will go for you, so that question belongs with your prescriber.
Where to read your own medicine's list
Look up the exact drug you were offered. The NHS page on tirzepatide and the MedlinePlus drug information for tirzepatide injection are two places to read a medicine's side effects in full. For background on obesity itself, the CDC's overview of obesity is a plain starting point.
Before you start
Ask your prescriber how they want to hear about diarrhea if it appears, and how soon. Write the answer down so you can act on it without guessing.