week 9 response
Response 1
Thank you for your thorough post this week on Neurological disorders and medications used to treat seizure disorders. I agree with you on the first question, that Shaynah should be informed of the risks associated with taking AED’s during pregnancy for the safety of the mother and unborn child. According to literature studies, he safety of antiepileptic drug use in pregnancy involves the mother, fetus, and subsequent extra-uterine existence as a neonate and infant. I also agree with you that the first drug of choice for Shayna should be Keppra 500mg daily. Although phenytoin is less sedating and considered the first line drug of choice according to (Woo &Robinson, 2020), I recommended the patient be started on Keppra 500mg daily due to its pregnancy category C and few drug-drug interactions. Given the information shared about Shayna’s plans to conceive, my thought process aligns with yours about starting her on a safe broad spectrum AED. As Shayna’s NP, I would suggest close monitoring of her symptoms while starting on Keppra 500mg daily for effectiveness up until the time she conceives. I also agree with you that the second line of treatment should be lamotrigine with gradual titration for therapeutic levels. In addition to your rationale for Shyana’s sub therapeutic levels of carbamazepine, the use of contraceptives is likely to be the cause of the drop in levels. According to literature studies,combining oral contraceptives with carbamazepine may not produce any toxicity or increased carbamazepine serum levels but can lead to lower limits of carbamazepine serum levels. Lazorwitz et al. (2017), Lastly, I agree with you that weaning her off the Valporic acid due to its side effects and pregnancy category would be a viable option and continuing her on Lacosamide would be a safer option for her and her unborn baby.
References
Tomson, T., Battino, D., & Perucca, E. (2019). Teratogenicity of antiepileptic drugs. Current Opinion in Neurology, 32(2), 246-252. https://journals.lww.com/co-neurology/Fulltext/2019/04000/Teratogenicity_of_antiepileptic_drugs.11.aspx
Woo, T, M., & Robinson, M. V. (2020). Pharmacotherapeutics for advanced practice nurse prescribers (5th ed.) Philadelphia, PA: F.A. Davis Company.
Lazorwitz, A., Davis, A., Swartz, M., & Guiahi, M. (2017). The effect of carbamazepine on etonogestrel concentrations in contraceptive implant users. Contraception, 95(6), 571-577.
Response 2
I enjoyed reading your post for this week’s discussion question because we chose many different answers. I liked reading your rationale for why you chose your answers especially since we came to different conclusions. I found similar information about levetiracetam that you included in your post when I was reading the course materials and UpToDate. I think it is hard to say who is absolutely right/wrong when answering this question because research is yet to identify a single antiseizure medication that is superior simply in terms of efficacy or tolerability (Karceski, 2021). Some of the factors used to determine which antiseizure medication to use include: drug effectiveness, potential adverse effects, interactions with other medication, comorbid medical conditions, age/gender and childbearing plans, lifestyle and cost (Schachter, 2021). Levetiracetam would not have been initiated as first line treatment because it is approved as adjunctive therapy for primary generalized tonic-clonic seizures. The dose on question two is also incorrect. When initiating levetiracetam treatment the initial dose is 500 mg BID not daily. This medication has a rapid onset and may be increased up to 4000mg a day (Schachter, 2022). Combination therapies are not preferred to monotherapy for seizures. Combination therapy reduce the likelihood of compliance, is more costly to the patient, and doubles the risk for drug interactions and adverse effects. I was also able to find some general principles to consider when starting an antiseizure medication: start with a single drug, gradually titrate, and monitor treatment regularly (Schachter, 2022). I am thankful that as a future nurse practitioner in women’s health, that I will be able to collaborate with other providers and specialists to determine the best medication regimens for my patients. I can definitely understand how this would be something that often gets referred to neurology as there are so many choices to make when it comes to antiseizure treatment.
References
Karceski, S. (2021, July 19). Initial treatment of epilepsy in adults. UpToDate. Retrieved March 4, from https://www.uptodate.com/contents/initial-treatment-of-epilepsy-in-adults?search=seizure+disorder+treatment&source=search_result&selectedTitle=2~150&usage_type=default&display_rank=2#H1
Schachter, S. (2021, November 15). Overview of the management of epilepsy in adults. UpToDate. Retrieved March 4, 2022, from https://www.uptodate.com/contents/overview-of-the-management-of-epilepsy-in-adults?search=seizure%20management&source=search_result&selectedTitle=1~150&usage_type=default&display_rank=1#H4
Schachter, S. (2022, February 8). Antiseizure medications: Mechanism of action, pharmacology, and adverse effects. UpToDate. Retrieved March 4, 2022, from https://www.uptodate.com/contents/antiseizure-medications-mechanism-of-action-pharmacology-and-adverse-effects?search=generalized+tonic+clonic+seizures&source=search_result&selectedTitle=6~135&usage_type=default&display_rank=6#H844055138