Search terms: "morphine" "morphine overdose" "taste of morphine" "drinking morphine" "morphine 1800s" "morphine 1850s" "morphine bottles 1850s" "morphine and alcohol". Looked through little details poison and medical tags.
I've got John Q. Miner, a thief who's succumbing to pneumonia in the Nevada mountains in 1850. He swiped the morphine from a miner or a pharmacist earlier in the story, for future use, and when he came down with pneumonia he decided to self-medicate with alcohol and morphine. This is the stupidest thing he could have chosen to do, but he doesn't know this. Towards the end of his illness/life, he's hiding in a shed with a bottle of gin and his stolen morphine. I have him mixing the morphine with the gin and literally drinking himself to death, but I'm not sure how much morphine he would need to render himself unconscious/stop his breathing. A teaspoon? A cup? One bottle? Three?
I'm assuming the bottles would have been on the small side but the internet isn't giving me much context to compare them.
Thanks for your time and as usual, I promise I'm not killing anyone IRL!