Topic says it all. I have tried every button, and I can't figure it out. Please GoG forums, help me with this! I really enjoy this game and want to proceed without having my arse handed to me simply because I can't use the health potions.
Thanks in advance!
Oh and sorry for the bad title, completly slipped my mind to check.

An easy way to do it it's to click once on a potion and then press U on your keyboard (U is the Use key). That's how i'm doing it anyway ;)

Left click on potion to pick it up and right click to use it on itself. This and more tips for beginners can be found here:
http://www.gog.com/en/forum/realms_of_the_haunting/tips_for_beginners

thank you very much guys! cheers!