I have a friend who recently obtained a very harsh criminal conviction for self prescrbing medication. Very sad story - he was raped and was simply too ashamed to : 1) Report it and 2) To tell anyone about this.
Therefore, he precribed medication to treat himeslf (he is medically qualified but legaly cannot self prescribe for himself.
I have heard that as he has a minor conviction - he will be denied admission to the USA for a holiday as he has a conviction.
Is this true? - taking the circumstances into account (he needed urgent help but simply went about it the wrong way)
If his crime was one involving moral turpitude (and I've no idea whether this one is or not - it would probably count as substance abuse, so probably yes) then he has two choices:
Go anyway and lie on the visa waiver form.
Apply for a visa and in all probablility be turned down given the recency and nature (not severity - that's irrelevant) of the crime.
If it wasn't moral turpitude then there's no bar on visiting the US