As others mentionned, you can't take the naphtalhene pills whatsoever, making the game unplayable, sadly. Up to this point, it definitely was a good game, original.
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I've tried again now - with the html5 version - and well it works :-| - to be exact you have to go to the Storage Room and
[SPOILTER]
not just Use the R pills but also (or just) look at the R pills - if you already checked naphthalene it should say that their similar to something he's already seen - after that if you got his room and interact with blankets in the wardrobe he should take them
Is this exactly what you did?
Got it, finally! I've accidently found out that you need to right click in order to look at the pill and since I'm on a chromebook and in order for the right click to register on the mousepad you need to press ALT+click (the usual 2 fingers touch doesn't seem to be treated as a right click in many games, anyway...) Glad I can proceed with the game!