Nov 8, - I overdosed on Valium and was very close to death. Google LD50 Clonazepam - you will find out how difficult it is to OD fatally on it. Votes: +eduface.euin and how much is too much? Possible Clonazepam side effects in 52 year old female. Reported by a . Reactions: Completed Suicide, Intentional Drug Misuse, Toxicity To Various Agents. Nov 30, - Klonopin also has a very high LD50, or the expected lethal dose for Extended use can result in increased suicidal thoughts and tendencies.