According to the National Alliance on Mental Illness, or NAMI, a person can die from an overdose of Klonopin, also known generically as clonazepam. Other serious side effects of Klonopin overdose include confusion, impaired coordination and coma.
NAMI states that people who take Klonopin should not drink alcohol or use illegal drugs. The interactions between Klonopin and other substances lead to increases in the adverse effects of Klonopin and decreases in its beneficial effects. The combination of Klonopin and alcohol puts users at an increased risk for accidental overdose.
Overdoses of the drug are reversible with the use of a medicine known as flumazenil, according to NAMI. Only doctors can decide if treatment with flumazenil is necessary before they administer it.