Presumably these can only refer to medical drugs and not recreational? The læge makes me think so at least!
You are correct.
Illegal drugs are called stoffer or narkotikum/narkotika.
Why is "the medicines" (plural) incorrect while "the drugs" is correct?
Medicines as a plural is a little unnatural to my ear. At least where I live it's nearly always a mass noun.
he is a bad boy
Is there a reason why "he steals the medications" is wrong?