Actually one of the biggest uses of pot, medicinally. It's a great anti-nausea medicine with no side effects (other than the high of course), but even a minute amount works. My wife has multiple conditions that qualify for it, just that our state hasn't legalized it yet. Mostly, because she takes so many meds, nausea is a side effect of them, and that can be alleviated with pot, allowing her to eat food. Same reason many cancer patients take it. Other anti-nausea meds are pretty harsh and have harsh side effects (or can just be very expensive).
Opium is made from poppies, I just started researching this one, but yeah, I want to know how to make meds post SHTF, because even stocked ones lose potency over time. Some meds even become toxic over time, so good to know (so I've heard). Again, just kind of at the beginning of this particular part of preps.
Recently, so many changes to laws, etc.
My wife is a chronic pain patient. Has been for years and years. Same doc, same pharmacies for years, etc. Yet, I feel like we're treated as criminals every time we try and fill a prescription. She's prescribed Oxycontin for night-time pain relief. Last time we filled it, it literally took us a MONTH to get it filled. Individual locations only get so much allocated, etc. Really ridiculous. When she saw the doc, they wondered why she wasn't taking it. We're like, "We can't get the prescription filled anywhere!" (and showed that we still had the script!). One day, I literally tried 6 different pharmacies, and none could fill it even with a partial fill. (I was off work that day, so able to drive around, as I took the day off to take her to doc appointments).