Follow the instructions carefully.
From Fallen London Wiki (Staging)
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From: Employ F.F. Gebrandt's Tincture of Vigour!
(Uses half the bottle.)
Unlocked with 
Locked with 
Success
Spoonful by spoonful
One spoonful before each meal. Another before you extinguish your bedtime candle. It does seem to have an invigorating effect.
Wounds is dropping… (-3 CP)
You've lost 1 x F.F. Gebrandt's Tincture of Vigour- You've gained 1 x F.F. Gebrandt's Tincture of Vigour: Half-Full
Subtle is increasing… (+1 CP, up to level 5)
