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Dr. Bob
Dr. Bob, Neurologist (MD)
Category: Neurology
Satisfied Customers: 5330
Experience:  Neurology & Int Medicine (US Trained): 20 yrs experience
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My son takes keppra 1000mg twice daily. He has been

Resolved Question:

Hi, my son takes keppra 1000mg twice daily. He has been prescribed cetrine 10mg daily. Is this safe to take with the keppra?
Submitted: 1 year ago.
Category: Neurology
Expert:  Dr. Bob replied 1 year ago.

Hi John. Cetrine is a brand name version of the common antihistamine cetirizine.

This medication is safe to take with Keppra at usual doses. No adverse side effects would be expected.

Customer: replied 1 year ago.
Please read information leaflet attached to cetrine. If a patient is predisposed to seizures, then cetrine 10mg daily may be dangerous for that patient.
Expert:  Dr. Bob replied 1 year ago.

Hi John. There are a lot of medications that contain this warning. Manufacturers often include it to cover themselves in the very unlikely event of a seizure. While it is always a possibility, I have never seen this medication trigger a seizure. Keep in mind that alcohol can also be dangerous in those predisposed to seizures. And drinking too much water can also trigger a seizure.

Customer: replied 1 year ago.
Thank you Dr. Bob. I really appreciate you taking the time to reply. My own research indicates the following:
"Seizures or convulsions have been reported in the literature with some first-generation antihistamines (chlorpheniramine, diphenhydramine, pheniramine and pyribenzamine) as well as with some newer-generation antihistamines (astemizole, cetirizine, fexofenadine, loratadine and terfenadine) (1-3). According to the US Food and Drug Administration Adverse Event Reporting System (July 1999), convulsions associated with cetirizine, fexofenadine and loratadine accounted for 2.5%, 3.1% and 2.1% respectively of the total adverse events reported with these drugs". (Reference: Our son suffered encephalitis in 2010 and was seizure free on Keppra up to October 2015. He was prescribed cetrine 10mg daily and has suffered 2 major seizures in the last 6 monrths. Both my wife and I are desperately searching for reasons and realise how difficult it is to pinpoint any specific trigger. Again many thanks. Your sincerely, John
Expert:  Dr. Bob replied 1 year ago.

Did his seizures occur within 36 hours of taking the cetrine (while it was in his bloodstream)? Has there been any seizure activity off the cetrine?

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