Question

fast food should come with warning like medicines​

Answer 1

Answer:

Ya you are right (sometimes).

Answer 2

That won't do the job as people will take it lightly and won't get serious about it. Though it is a good suggestion and fast food should come with a warning like eating too much is dangerous for health and may cause serious illness or anything like that.

It would be a miracle if people pay attention to the warning as humans don't take such warnings seriously, taking the example of warnings on cigarette packets. Cigarette packets to have warnings on them, people still use them and face the consequences.