It 's been alleged by several people from The Celebrity Apprentice era. This Newsweek article quotes Tom Arnold backing up another guy (Noel Casler) who worked on the show and some of Trump’s beauty pageants. They claim that Trump would crush and snort Adderall on set.

There’s also a photo from the oval office with Trump near an open drawer with multiple boxes of Sudafed in it. Snopes verifies that the image is legit, but evaluates the claims that the presence of the Sudafed is evidence of drug abuse as false.

Personally, I am not sure that I think the pic of the Sudefed is really evidence of drug abuse but I do think Snopes may have missed a beat on this one. Snopes claims that the particular formulation in the boxes uses phenylephrine rather than pseudoephedrine. Phenylephrine will not give you a high. However, as a someone with chronic sinus problems, I have been taking Sudefed when I need it for decades. When the phenylephrine formulations were first released they never worked for me at all. I was always able to get the same medicine with pseudoephedrine, though. I just had to get it from the pharmacist since they don’t sell it over the counter and require ID.

The packaging for both formulation look the same, just the ingredient list is different. The images I’ve seen of the boxes in the drawer have never been clear enough to say which formulation is in the drawer.