Is there a difference between ativan and klonopin (clonazepam)?

Yes: Both Ativan and Klonopin (clonazepam) are benzodiazepines and can be used to treat anxiety symptoms. Ativan is shorter-acting than Klonopin (clonazepam) though -- half-life of 8-24 hours compared to 19-60 hours.

Similar & different: Both are "benzodiazepine" tranquilizers, which means they are chemically similar and relieve anxiety by their effect on GABA receptors in the brain. They are also both habit-forming if taken regularly. Comparing the two, Klonopin (clonazepam) is more sedating and lasts longer than the same dose of Ativan (lorazepam).

Yes and no.....: Same chemical class and both help with anxiety; but Klonopin (clonazepam) takes longer to get in your system and take effect and typically lasts longer but leaves your system more gradually, while Ativan gets in and out faster.

1/2 life: Ativan has quicker onset and excretion;whereas Klonopin (clonazepam) is longer to take effect and stays in body longer.

Ativan/klonopin: Ativan can last 4-6 hours, Klonopin (clonazepam) up to 12 hours. Also, Ativan can be injected and that is used in er for emergencies. There is a form of Klonopin (clonazepam) that works fast and can be dissolved on tongue, called Klonopin (clonazepam) wafers.

Duration of action &: One is short-acting, the other long-acting. One has greater risk of addiction than the other. One is metabolized in the liver, the other is not.