In reply to NEClimber:
Just realised Im sat next to my copy of The White Spider :
'Just then a little phial of heart drops came to hand in the first aid bag. That devoted woman Dr Belart of Grindelwald had made me take it along in case of emergency, remarking :"If Toni Kurz had only had them along, he might even have survived his ordeal".
We were only supposed to use them in the direst need though.
On the bottle it said "ten drops". I simply poured half of it into Wiggerls mouth and drank the rest, as I happened to be thirsty. We followed it up with a couple of glucose lozenges, and were soon in proper order again."
The White Spider, Heinrich Harrer (1995) P120
Brilliant story and if not for the drugs it may never have been told.