You can't pick and choose what you want to be made illegal. If you say that weed is a medicine, what about the people who use pscilocybin for cluster headaches. What about people who take LSD for therapy, or MDMA for PTSD. You can't tell people what works as medicine and what doesn't. Look at what happened with weed, the FDA just said "it's not a medicine, fuck you people who use it."
I may not agree with what drug you're taking, but I will defend to the death your right to take it!
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I'm not religious, but I don't understand why the more conservative religious groups decry cannabis. If god created this awesome, euphoric, pleasant, medicine why would he want to you to not use it. Of course poppies have medical use so god created them to help us out.