Which fallacy is this sentence an example of?

Question

Prescription drugs are not adequately tested and can be harmful. Aren't alternative medicines better than prescription drugs then?
ad hominem
begging the question
complex question
slippery slope

Answer 1

By what evidence is it established that alternative medicines are adequately tested and are not harmful?  

 

That is a form of begging the question.  The desired conclusion has been offered without proof as if it were an argument.