As with all alchemical ingredients used to make Potions and Poisons, matching the effects of alchemical components makes a stronger potion/poison.
To make any potion or poison, you need two ingredients with the same effect, even if in the same slot of the 2x2 grid of components represented for all ingredients.
Basic Frenzy Poison
(Made with two ingredients bearing the Frenzy component in the same position.)
Duration, 1 Minute. DC 14
Strong Frenzy Poison
(Made with two ingredients bearing the Frenzy component in 2 of the 4 positions.)
Duration, 1 Minute. DC 15
Potent Frenzy Poison
(Made with three ingredients bearing the Frenzy component in 3 of the 4 positions.)
Duration, 1 Minute. DC 16
Mighty Frenzy Poison
(Made with four ingredients bearing the Frenzy component in each position.)
Duration, 1 Minute. DC 17