I ended up with these.
Citrosan: Koorts en pijn bij griep en verkoudheid.
Strepsils: Sinaasappel & Vitamine C bij beginnende keelpijn.
Now I know verkoudheid is the word for cold, as in the sickness, but it has "koud" in it, so I figured that was good. Plus, I knew griep was probably flu because it's la grippe in French.
Sinaasappel is orange and keelpijn looks like throat pain = sore throat?
So now that I've had the opportunity to translate them, Citrosan is a lemony drink that's supposed to get rid of fever and pain associated with colds and the flu, and Strepsils is an orangey sore throat drop. If I don't feel better tomorrow, I might have to go to an actual drug store to try to get rid of this congestion. I don't think my coworkers appreciate me becoming a mouth-breather. Does anyone know the Dutch word for Dayquil?