For pills, tapioca pearls work fine ... just spritz them with food coloring ... but don't go bananas with the food coloring ... you don't want your quinine pills looking brighter than the sun, LOL!!! Opium pills, I use peppercorns ... they are as about as close as I could find. If you use something that isn't consumable (say like face powder for calomel), make sure it is secured, so "lil Johnny" doesn't pop the top, thinking it's edible, and start swallowing.
If this is for a field station impression ... all I use are morphine, opium and quinine look-alikes (fine sugar for morphine, peppercorns for opium and yellow food coloring spritzed tapioca pearls for quinine pills). You wouldn't really need anything else "in the field". Remember, the care you're giving, is only temporary ... it would be enough to stablize them until they arrive at the field hospital.
[FONT="Book Antiqua"]I Remain, Your Obedient Servant,
Jimmy "Doc" Nelson
Resident Medical Geek
Western Federal Blues