Coffee Booster makes it so your 'Mons in one habitat won't fall asleep for the set duration (10 hours), so it can boost a high income, low wake time earner.
The pill is medicine to be used if a 'Mon gets sick (part of unlocks at day 12) it is the mid-tier of three medicines. My 'Mons haven't gotten sick yet, so specifics are beyond me
I bought energy drink to answer your question- 2 hours of double coins for a habitat, so meant to be used on your highest income habitat.
I don't have the points right now to buy public health. I want to guess it cures any sick 'Mons within a habitat but not certain.
Callout to anybody who has Public Health or is willing to fork the 1000 points over. What it do?