Is it permissible to take weight-loss injections half an hour before breakfast, knowing that they are administered in the abdomen, thigh, or arm, and that they help increase the metabolic rate and suppress appetite?

Weight loss injections (Saxenda) do not break the fast of a fasting person because they are neither food nor drink, nor do they take their place. They work to suppress appetite and reduce the desire to eat, and are not nourishing. However, if they are injected into the stomach, they do break the fast.