Do you think that we can mix the Nembutal with pure syrup (ex:grenadine) to mitigate the horrible taste that it must have?
You can mix it with sugar, artifical sweeteners, concentrated juice, essential oils, etc.
This is a recipe used at a Belgian hospital:
For 100 ml:
Sodium pentobarbital (or sodium secobarbital) - 12 g
Ethanol 96% ABV - 20 ml
Purified water - 15 ml
Propylene glycol - 10 ml
Sodium saccharin - 250 mg
Simple syrup - 65 g
Anice essential oil - 1 drop
Saccharin is an artifical sweetener, and simple syrup is just regular sugar boiled with water. The star anise essential oil gives it flavor, I guess.