Their is also this item (Basic poison)
https://roll20.net/compendium/dnd5e/Basic%20poison#contentOverall, from what I hear from my dnd players and people in general is that poisons are handled very poorly in 5e. Mostly due to to either being really strong or really weak, based on how much money you have, your level, and the dc being fixed as well as other factors.
I don't know how that relates to Diping, i haven't used it enough to compare.