Re: Arsenic
I found write-ups for Arsenic in An Eye for an Eye, a 4th edition book in the Dark Champions line. Written (I sure this will surprise you:winkgrin:) by Steven S. Long.
I hope Mr. Long doesn't mind if I post them here. Yes, more than one: one for immediate effect, one for long-term effect. I've changed the formating a little, and spelled out the "common limitations" (there were ~20 poisons in AEFAE).
Arsenic (Concentrated Dose)
3d6 RKA, NND (defense is appropriate Immunity, +2), (135 Active Points); OAF (fragile poison and possibly some means of projecting it, injecting it, or having it ingested, -1 1/4), No KB (-1/4), No Range (-1/2), 1 Charge (-2), Extra Time (up to a few days before onset, -3 1/2), Gradual Effect (up to 12 hours, -2 1/2), (12 Real Points )
Arsenic (Long-Term Dose)
3d6 RKA, NND (defense is appropriate Immunity, +2) (135 Active Points); OAF (fragile poison and possibly some means of projecting it, injecting it, or having it ingested, -1 1/4), No KB (-1/4), No Range (-1/2), 1 Charge (-2), Gradual Effect (small doses given over the course of 1 month, -4) (15 Real Points)
plus 2d6 CON Drain, NND (defense is appropriate Immunity, +2), Recover 5 points per day (+1 1/4); OAF (fragile poison and possibly some means of projecting it, injecting it, or having it ingested, -1 1/4), 1 Charge (-2), Gradual Effect (small doses given over the course of 1 month, -4), Linked (-1/2); Total cost: 25 points
I think the second is what you're looking for.
Hope that helped.