Reference: Liqaa.aat al-Baab al-Maftooh – Volume 1, Page 47, Number 72
Question: Is the [pronouncement of] divorce by the one who is intoxicated carried out?
Response: We do not issue fatwa rulings in these matters, unless such an issue has actually occurred with a particular person.
However, the general rule is that this matter should be taken to the [sharee’ah] court. And if the court decides that the divorce is to be carried out, then it will be carried out; and if the court decides the divorce is not to be carried out, then it will not be carried out.