In the beginning, Adam wasn't cursed. So he wouldn't have experienced any of these maladies, so would have had no use for any medicinal compounds. Perhaps you're taking the "tree of life" a little too herbally. I think it rather reflects the presence of the kingdom of God, but what it actually denotes I'm not sure. Possibly it prefigures the salvation of Christ, or Christ.In the beginning Adam was completely naked, which strongly suggests to me that
he made use of the tree practically every day for common conditions like sun burn,
abrasions, rash, and insect bites which, again, strongly suggests to me that in His
own time, the creator would've eventually gotten around to showing the people
how to make clothing, not so much for modesty, but primarily to protect their skin.
Luk 13:18 "Then Jesus asked, “What is the kingdom of God like? What shall I compare it to?
Luk 13:19 "It is like a mustard seed, which a man took and planted in his garden. It grew and became a tree, and the birds perched in its branches."