Tirzepatide is from a class of drugs called GLP-1 agonists. GLP-1 helps regulate hunger and is released by the intestines after a meal. 

Tirzepatide is similar to GLP-1, and so regulates appetite causing you to feel fuller and less hungry. This can lead to a feeling of fullness more quickly. As a result, you eat less, and can lose weight more easily. Focussing on eating a reduced-calorie diet will further enhance the benefits of this drug.