-- Professor Snape (GF18)
A CLEAN CAULDRON KEEPS POTIONS FROM BECOMING POISONS and ANTIDOTES ARE ANTI-DON'TS UNLESS APPROVED BY A QUALIFIED HEALER.
-- Sign on the wall at St. Mungo's Hospital (OP22)
There are antidotes for many poisons and for potions effects.
ingredients: vary, but often include mandrakes or a bezoar.
References from the canon
- Antidote for Swelling Solution is the Deflating Draught (CS11)
- Fourth-year Potions studies antidotes; Snape hinted that he might poison a member of the class before Christmas to see if his or her antidote worked (GF15)
- The Mandrake Draught is the antidote for Petrification
- A bezoar will act as an antidote to most poisons (PS8). Ron consumed one during his sixth year (HBP19).
- Snape had an antidote handy to restore Trevor the toad when he was turned into a tadpole with Shrinking Solution (PA7).
- Mrs. Weasley had an antidote handy for Doxy bites when she and the children spent the morning de-Doxifying the draperies of the drawing room of number twelve, Grimmauld Place (OP6).
- At least one antidote to counter the effects of Veritaserum exists (HBP17)
- Slughorn supplied "a glass of clear liquid" as an antidote to the love potion Ron had accidentally eaten (HBP18)
from the Greek "antidoton" meaning "given as a remedy"