This special potion cures blindness, deafness, disease, feeblemindedness, insanity, infection, infestation, poisoning, and rot. 

It will not heal wounds or restore hit points lost through any of the above causes. 

Half a flask will cure any one or two of the listed problems. 

Imbibing the whole potion will cure any and all of the above afflictions that the drinker may be suffering.