Much like meth

It occurred to me that my allergy medicine makes me feel really great! Like amazing crazy kind of high great, and then I went, "Wait a minute! People make meth from my allergy medicine." It occurs to me that there may be something to this logic. I take Claritin (but not Claritin D--the kind you have to show your ID to a pharmacist to buy), so it isn't the kind that had to be regulated against meth production. But really, meth?