Wis. Stat. § 939.42
An intoxicated or a drugged condition of the actor is a defense only if such condition is involuntarily produced and does one of the following:
Wis. Stat. § 939.42
To be relieved from responsibility for criminal acts, it is not enough for a defendant to establish that he or she was under the influence of intoxicating beverages; the defendant must establish that degree of intoxication that means he or she was utterly incapable of forming the intent requisite to the commission of the crime charged. State v. Guiden, 46 Wis. 2d 328, 174 N.W.2d 488 (1970). This section does not afford a defense when drugs were taken voluntarily and the facts demonstrate that there was an intent to kill and conceal the crime. Gibson v. State, 55 Wis. 2d 110, 197 N.W.2d 813 (1972). Evidence of addiction was properly excluded as a basis for showing "involuntariness." Loveday v. State, 74 Wis. 2d 503, 247 N.W.2d 116 (1976). The intoxication instruction did not impermissibly shift the burden of proof to the accused. State v. Reynosa, 108 Wis. 2d 499, 322 N.W.2d 504 (Ct. App. 1982). A correct statement of the law under this section should be conveyed to the jury by instructing it that it must consider the evidence regarding whether the defendant was intoxicated at the time of the alleged offense. State v. Foster, 191 Wis. 2d 14, 528 N.W.2d 22 (Ct. App. 1995). It is not a requirement of the defense of involuntary intoxication when intoxication is caused by prescription drugs that the defendant did not know of the drug's intoxicating effect. Intoxication resulting from compliance with a physician's advice will not be deemed voluntary just because the defendant was aware of potential adverse side effects. State v. Gardner, 230 Wis. 2d 32, 601 N.W.2d 670 (Ct. App. 1999), 98-2655. To be entitled to an instruction on involuntary intoxication, the defendant must come forward with credible and sufficient evidence of intoxication to the extent that the defendant was unable to distinguish right from wrong. State v. Gardner, 230 Wis. 2d 32, 601 N.W.2d 670 (Ct. App. 1999), 98-2655. Alcoholism as a defense. 53 MLR 445. Due Process and the Voluntary Intoxication Defense. Larson. Wis. Law. Feb. 2019.