Effective Use of Poison
by Bill Coburn
 
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Dungeons & Dragons Dragon magazine - Equipment (AD&D) The Dragon #18
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Poison code Found Description Effect
A Potion Arsenic, Hemlock, etc. 80% Death in 2-8 turns
B Gas, Darts, Cobras, Needles Neurotoxic 50% Death in 4-16 turns 
Strikcen 1-3 days 
Unconscious in 30 min. for 1-4 days
C Spiders, Scorpions, Purple Worms, Other snakes, Wyverns ... Etc. Hemotoxic 10% Death in 1-4 days 
Stricken 1-10 days
Unconscious in 1 hour for 2-8 days

Poison in general:
If a player does not make it’s saving throw, it shall be considered poisoned.
If that player does not die it is considered “STRICKEN”. A
stricken player will be hindered in the following manner;

Strength = 1/2
Dexterity = 1/2
Constitution = 1/2
Movement = 1/2

In the case of unconsciousness, “stricken” takes effect upon regaining
consciousness. Neutralize Poison, if successful, will cancel all deleterious
manifestations.

Armor will have some bearing on the outcome of an encounter. Here
are the simple adjustments we use, towards saving throws:

Plate +2
Chainmail +1
Leather 0
No armor -2

Armor has no effect on the poisons that have been taken internally. If a
portion of a potion is drunk, each individual portion will have it’s own
saving throw. Plus the amounts are applicable to each other, for their
own separate saving throw.