The New York Times concludes that Obama’s drug use was not very extensive.

Mr. Obama’s account of his younger self and drugs, though, significantly differs from the recollections of others who do not recall his drug use. That could suggest he was so private about his usage that few people were aware of it, that the memories of those who knew him decades ago are fuzzy or rosier out of a desire to protect him, or that he added some writerly touches in his memoir to make the challenges he overcame seem more dramatic.

In more than three dozen interviews, friends, classmates and mentors from his high school and Occidental recalled Mr. Obama as being grounded, motivated and poised, someone who did not appear to be grappling with any drug problems and seemed to dabble only with marijuana.