Recipe:
0.1u fanciulli
0.1u branca menta
0.4u neurotoxin
4.4u sulfonal
5u bone hurting juice
Effects on the human body:
Fanciulli: Causes a minor tick of stamina damage.
Branca Menta: Causes a moderate tick of stamina damage [when drank].
Neurotoxin: Drugs you, makes you dizzy, deals up to 75% brain damage over time, randomly causes you to drop items and take stamina damage. After 5 cycles starts randomly paralyzing your limbs. After 30 cycles deals more brain damage but without limit. After 50 cycles (over 20 units) it has a 15% chance per cycle to give you a heart attack.
Sulfonal: 1 toxin damage every 2 cycles, knocks you out after 22 cycles.
Bone Hurting Juice: Does 7.5 stamina damage per tick. If you're a skeleton or a plasmaman, it will deal additional 0.5 brute damage per tick.
Strategy
Inject/feed target for more potency, or use in grenade along with smoke to cause instant knockout/paralysis.
If going with the nade option, crank the amount of ingredients up.