R.S.Mo. § 562.076. Intoxicated or drugged condition

1. A person who is in an intoxicated or drugged condition, whether from alcohol, drugs or other substance, is criminally responsible for conduct unless such condition is involuntarily produced and deprived him of the capacity to know or appreciate the nature, quality or wrongfulness of his conduct.

2. The defendant shall have the burden of injecting the issue of intoxicated or drugged condition.

3. Evidence that a person was in a voluntarily intoxicated or drugged condition may be admissible when otherwise relevant on issues of conduct but in no event shall it be admissible for the purpose of negating a mental state which is an element of the offense. In a trial by jury, the jury shall be so instructed when evidence that a person was in a voluntarily intoxicated or drugged condition has been received into evidence.

Kansas:

K.S.A. § 21-3208. Intoxication.

(1) The fact that a person charged with a crime was in an intoxicated condition at the time the alleged crime was committed is a defense only if such condition was involuntarily produced and rendered such person substantially incapable of knowing or understanding the wrongfulness of his conduct and of conforming his conduct to the requirements of law.

(2) An act committed while in a state of voluntary intoxication is not less criminal by reason thereof, but when a particular intent or other state of mind is a necessary element to constitute a particular crime, the fact of intoxication may be taken into consideration in determining such intent or state of mind.

Model Penal Code

M.P.C. § 2.08. Intoxication.

(1) Except as provided in Subsection (4) of this Section, intoxication of the actor is not a defense unless it negatives an element of the offense.

(2) When recklessness establishes an element of the offense, if the actor, due to self-induced intoxication, is unaware of a risk of which he would have been aware had he been sober, such unawareness is immaterial.

(3) Intoxication does not, in itself, constitute mental disease within the meaning of Section 4.01.

(4) Intoxication which (a) is not self-induced or (b) is pathological is an affirmative defense if by reason of such intoxication the actor at the time of his conduct lacks substantial capacity either to appreciate its criminality [wrongfulness] or to conform his conduct to the requirements of law.

(5) Definitions. In this Section unless a different meaning plainly is required:

(a) "intoxication" means a disturbance of mental or physical capacities resulting from the introduction of substances into the body;

(b) "self-induced intoxication" means intoxication caused by substances which the actor knowingly introduces into his body, the tendency of which to cause intoxication he knows or ought to know, unless he introduces them pursuant to medical advice or under such circumstances as would afford a defense to a charge of crime;

(c) "pathological intoxication" means intoxication grossly excessive in degree, given the amount of the intoxicant, to which the actor does not know he is susceptible.