Is it ethical to use medications in a situation where there is no life-threatening situation?

According to Wiki, suffering is usually caused:
*”Animals on whom the experiment was conducted usually feel physical, mental, or both suffering.”*

Also, eating animal-type food, according to some studies, and especially many people who experienced a physical problem when they became vegetarians (I understood that a huge percentage return to eating animal-type food, despite the moral difficulty, because of problems they experienced as vegetarians), ultimately prevents suffering in humans.

For example, should a moral person prevent his children from eating meat and eggs (in a certain amount) if this only involves the possibility of a certain risk to their development?

Should a person stop eating meat, eggs, or milk if he has experienced weakness since he stopped eating?

A little apologetics I don't see that much difference between controlled eating of animal-type food and taking mild medications (when the situation is not life-threatening) - in both cases animals probably suffered.

I don't have a blanket answer to all these questions. Each one has their own considerations. Clearly, there is a moral virtue in avoiding as much as possible. How much is possible and how difficult it is - everyone decides for themselves.