Can only use for specific intent offences if D did not form MR
Gallagher, However, where there is a fall-back offence (that can be committed recklessly) then voluntary intoxication will only be a partial defence, e.g. murder to manslaughter (Lipman)
Cannot use for basic intent offences – getting intoxicated is reckless in itself (Majewski)
CoA took an alternative approach in Richardson & Irwin – ask jury whether D would have seen the relevant risk had they been sober.
Involuntary manslaughter:
Includes being spiked, or a prescription drug that has the opposite effect
Defence to specific & basic intent offences, as D has not been reckless in getting intoxicated (Hardie)
Cannot use involuntary intoxication as a defence if D formed MR (Kingston)