Only if you don't inhale, like Bill Clinton.
Will you also be supplying quotes in support of your quotes - or does that requirement apply only to me?
When I post a link, it contains a quote that supports what I claimed when I posted the link. You said that Courtwright agreed with you and you posted a link. I went to the link, I looked for some quote from Courtwright which would indicate he agreed with you, and I didn't find one.
How am I to know that Courtright does in fact agree with you when I can't see some sort of quote which indicates that he does? If I am to merely take your word for it, what is the point of providing a link? It only wasted my time.
By all means, let us both use the same standards when it comes to providing evidence in the form of links.
Courtright has a 30-plus-page bibliography ... buy the book if you're dying to know.
And I am to buy this book of his just to learn if he agrees with you or not? I don't think I want to know that badly.
You don't seem to have looked very hard. Click the only chapter available for reading and you'll find on the first page: "the rate of opiate addiction in America increased throughout the nineteenth century, from not more than 0.72 addicts per thousand persons before 1842 to a maximum of 4.59 per thousand in the 1890s; thereafter the rate began a sustained decline."