A study researching CBD interactions with seizure meds in people added that “Because all of the participants are also taking other seizure drugs while they are receiving the investigational therapy, investigators checked the blood levels of their other seizure drugs to see if they changed. "With any new potential seizure medication, it is important to know if drug interactions exist and if there are labs that should be monitored while taking a specific medication," said lead author Tyler Gaston, MD,” via Science Daily.
Dr. Gaston and her colleagues found that there were significant changes in levels of the drugs clobazam (and its active metabolite N-desmethylclobazam), topiramate, and rufinamide in both adults and children, and zonisamide and eslicarbazepine in adults only.
Except for clobazam/desmethylclobazam, however, the drug levels did not change outside of the normally accepted range. In addition, adult participants in the study taking clobazam reported sedation more frequently.
Additionally, when seizure patients were using valproate, they added that “Tests also showed that participants taking valproate and CBD had higher ALT and AST (liver function tests) compared with participants not taking valproate.
Very high ALT and AST indicate abnormal liver function, but significant ALT and AST elevation occurred only in a small number of participants (4 children and 1 adult), and the levels returned to normal after discontinuation of valproate and CBD.”
The study concludes that “The findings emphasize the importance of monitoring blood levels of antiepileptic drugs as well as liver function during treatment with CBD. "
A perception exists that sinceCBD is plant based, that it is natural and safe; and while this may be mostly true, our study shows that CBD, just like other antiepileptic drugs, has interactions with other seizure drugs that patients and providers need to be aware of," said Dr. Gaston.”