A member asked:

My son took a single dose of clonazepam .25mg. how long will it be in his system? should i take him to hospital ?

5 doctors weighed in across 2 answers

Age/weight/symptoms: The clonazepam's listed half life is 18-50 hours(time until 1/2 has left the body).It can produce lethergy, breathing problems, cyanosis, all worrisome. It would be prudent to call your local poison control office & discuss the specifics of your case & they can direct you to the proper care. If you don't have a local number, contact 800-222-1222. Thiscenter can help.

Answered 5/1/2016

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Dr. Pamela Pappas answered

Specializes in Psychiatry

Clonazepam: Clonazepam is a very long-acting medicine. Its elimination half-life is at least 30-40 hours, and it takes 5 times that time to be completely gone (meaning, at least 200 hours or about 8 days). I don't know how old your son is? If he is awake and doing well, call his pediatrician and ask for recommendations. If your son is lethargic or otherwise not acting normally, he needs to be seen.

Answered 5/1/2016

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