Should there be some performance drugs in Penumbra?

[Thaliur]

Hmm, one thing I remember about adrenaline shots is the way they're applied...
I think the last thing Philip would like to do in his situation is sticking something he found in an abandoned mine right into his heart...

What I could imagine though would be a kind of tranquiliser (a pill that, as long as it's effect lasts, inceases the time until you give away your position when spotting an enemy. Or maybe just some alcoholic beverage ^^)