Yes it is. A slight overdose is lethal. When taken powerful hallucinations occur.
Finnick and Beetee. Johanna and Peeta and Enobaria were captured by the Capital, but were later rescued
Katniss, Peeta, Finnick, Johanna, Beetee, and Enobaria survived the explosion.
Johanna was captured by the Capital at the end of the games, same with Peeta and Enobaria, but the three of them were rescued in the third book Mockingjay
No one! After Peeta so called "BEGGED" Katniss to marry him District 8 had and uprising and when it was just Beete, Finick, Joanna, Enobaria, Peeta, and Katniss they all left the arena.
Katniss is rescued from the Quarter Quell and the Capitol picked up Peeta, Johanna, and Enobaria. While on the rescue hovercraft, Gale tells Katniss that there is no District Twelve, hinting that it has been destroyed.
In the first book, Katniss and Peeta both survive because Katniss pulls out poisonous berries (referred to as nightlock) and gives half of them to Peeta, telling him that if they both can't live, then niether of them should. In Catching Fire, Finnick, Beetee, Enobaria, Johanna, Katniss, and Peeta all survive because Katniss blew up the force field to the arena.
Katniss Everdeen (District 12), Peeta Mellark (District 12), Johanna Mason (District 7), Finnick Odair (District 4), Beetee (District 3) and Enobaria (District 2)
SPOILER ALERT: The rebels destroy the forcefield around the Arena. Beetee, Finnick, and Katniss are rescued by the rebels. Peeta, Johanna, and Enobaria are taken by the Capitol. Gale tells Katniss that District 12 has been destroyed.
No one really won. The ones that were left were Katniss, Peeta, Finnick, Beetee, and the other girl.
No. She is taken by the Capitol and tortured for information but in Mockingjay the rebels save her from the Capitol and she is still alive when it is time to decide what the Victors want to do with the Capitol. She was one of the few victors that made it through Mockingjay.
Either Brutus or Enobaria were responsible for cutting the wire and preventing the plan from working. However Beetee seemed to have forseen this as he had left several metres of wire slack. The real plan was to break them out of the arena, to be rescued by District 13.