Genesis 9:6 Whosoever sheds man's blood, by man shall his blood be shed: for in the image of God made he man.
If a person chooses to do drugs, and as a result, their mental abilities were impaired, and they committed crimes in that state of mind, they will be held responsible for their decisions and actions. If you know that certain drugs on the market could trigger suicidal thoughts, or undue violence against other persons, the decision to take those drugs will rest with the individual, if they have a choice in the matter.
If the person did not know, then the matter will be decided by God, who sees all and knows all. In cases where mind altering drugs may have caused persons to do the unthinkable, while in that state of mind, when they do come to themselves and realize what they have done, they would have to label their actions as sin, and confess to God. But never must it be said that it was an innocent act.
Many years ago, after smoking some Ganja, a man drove a car at high speed though the suburbs, and almost caused several accidents, by which persons could have been killed. It was the hallucinatory drug that interfered with rational thought, and thus, even though he was not presently aware of what he was doing, he is responsible for taking the drug.
Revelation 20:12 And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works.
May God add His blessing to the study of His word. “Good night” and God bless!