On the contrary, The Apostle says (Rom. 13:13): "Not in rioting and drunkenness."
I answer that, Drunkenness may be understood in two ways. First, it may signify the defect itself of a man resulting from his drinking much wine, the consequence being that he loses the use of reason. In this sense drunkenness denotes not a sin, but a penal defect resulting from a fault. Secondly, drunkenness may denote the act by which a man incurs this defect. This act may cause drunkenness in two ways. In one way, through the wine being too strong, without the drinker being cognizant of this: and in this way too, drunkenness may occur without sin, especially if it is not through his negligence, and thus we believe that Noah was made drunk as related in Gen. 9. In another way drunkenness may result from inordinate concupiscence and use of wine: in this way it is accounted a sin, and is comprised under gluttony as a species under its genus. For gluttony is divided into "surfeiting [Douay: 'rioting'] and drunkenness," which are forbidden by the Apostle (Rom. 13:13).
Reply Obj. 1: As the Philosopher says (Ethic. iii, 11), insensibility which is opposed to temperance "is not very common," so that like its species which are opposed to the species of intemperance it has no name. Hence the vice opposed to drunkenness is unnamed; and yet if a man were knowingly to abstain from wine to the extent of molesting nature grievously, he would not be free from sin.
Reply Obj. 2: This objection regards the resulting defect which is involuntary: whereas immoderate use of wine is voluntary, and it is in this that the sin consists.
Reply Obj. 3: Even as he that is drunk is excused if he knows not the strength of the wine, so too is he that invites another to drink excused from sin, if he be unaware that the drinker is the kind of person to be made drunk by the drink offered. But if ignorance be lacking neither is excused from sin.
Reply Obj. 4: Sometimes the correction of a sinner is to be foregone, as stated above (Q. 33, A. 6). Hence Augustine says in a letter (Ad Aurel. Episc. Ep. xxii), "Meseems, such things are cured not by bitterness, severity, harshness, but by teaching rather than commanding, by advice rather than threats. Such is the course to be followed with the majority of sinners: few are they whose sins should be treated with severity." _______________________
SECOND ARTICLE [II-II, Q. 150, Art. 2]
Whether Drunkenness Is a Mortal Sin?
Objection 1: It would seem that drunkenness is not a mortal sin. For Augustine says in a sermon on Purgatory [*Serm. civ in the Appendix to St. Augustine's works] that "drunkenness if indulged in assiduously, is a mortal sin." Now assiduity denotes a circumstance which does not change the species of a sin; so that it cannot aggravate a sin infinitely, and make a mortal sin of a venial sin, as shown above (I-II, Q. 88, A. 5). Therefore if drunkenness is not a mortal sin for some other reason, neither is it for this.
Obj. 2: Further, Augustine says [*Serm. civ in the Appendix to St. Augustine's works]: "Whenever a man takes more meat and drink than is necessary, he should know that this is one of the lesser sins." Now the lesser sins are called venial. Therefore drunkenness, which is caused by immoderate drink, is a venial sin.