Accept it fully.
I think what you're not understanding is that taking the drug is the death acceptance technique. It is the thing that allows these people to quickly transition into peace. Do you have a better way? Could you please share that so all of our dying family members could finally have the simple solution you seem to be aware of?
1. Cultivating the spirit. This is slow and has a high abandonment rate, but it is second-to-none in terms of living a fulfilling life. It is worth pursuing, but is unfortunately ill-suited for rescuing people who are in the midst of a mental-health emergency. It should be thought of as "prevention".
2. Cultivating psychoactive substances. This is riskier than the first option, but it has two main advantages: (1) with some precautions, it is immensely helpful in connecting people with their spiritual lives and (2) in an emergency, it is reliably effective. This is on par with the discovery of antibiotics, in terms of medical significance. It should be thought of as "intervention".
Why anyone would willingly renounce the use of either? On what principle? This is obscurantism.
> It wasn't that he was filled with spiritual language like, "God's gonna save me." No, it was an acceptance for his condition and a reassurance to the people he loved most, that everything was OK, everything was as it should be, and they felt uplifted by that.
And more importantly, how do you propose people who struggle to do this reach that acceptance?