On the topic of side effects though, one thing I do think is important is to understand how Mounjaro work and what it is designed to do. Understanding that helps to identify why you might be getting side effects and how to stop them, also to ensure you are using it effectively.
MJ works by increasing a couple of hormones that govern how much insulin is produced and how sensitive you are to the insulin produced. So your body should be more effective at breaking down glucose which prevents it from converting to fat and reduces the effects of high blood sugar.
If you do not eat, if you restrict very very heavily then you are very likely to experience low blood sugar - light headedness, fatigue, weakness. You will also just deal with the standard effects of a VLCD like poor skin, muscle wastage/weakness, hair loss,
It also slows down your digestion which helps you to feel fuller for longer, so if you eat greasy food, highly acidic foods, a complete lack of fibre then that will sit in your guts for longer and is likely to irritate and cause you to feel unwell.
To achieve the best results and feel good while you do it, you should use an online calculator to figure out your TDEE and eat 500 less calories than that. What you eat should be healthy, nutritious and varied. Protein, good fats, green veg, berries, nuts, seeds, whole grains. Avoid/reduce refined carbs, bad fats and high sugar fruits.
Also try to up your exercise if you can to keep your muscles strong and increase your metabolism and drink lots of water because it’s actually used in the process that breaks down and expels fat so if you don’t have enough your weight loss will stall.
MJ is in my opinion brilliant stuff, it has not got rid of my hunger or made it impossible to eat, but it has somehow made it so I just don’t care as much about food, I enjoy what I eat, but I’m not thinking about it all the time, if my belly rumbles and I know I’ll be having dinner soon then I can just ignore it and wait without obsessing over how hungry I am, if I see a delicious cake in a cafe, I tell myself no and it’s fine I don’t regret it or think about it non-stop until I give in and get it. It makes it easier to stick to the diet long term and not fall off the wagon.