Evaluating the impact of antiretroviral and antiseizure medication interactions on treatment effectiveness among outpatient clinic attendees with HIV in Zambia

Pre- and Post-Exposure Prophylaxis for HIV in Patients Taking Anti-Seizure Medications

The prevention of human immunodeficiency virus (HIV) infection has recently emphasized the use of pre- and post-exposure prophylaxis (PrEP and PEP), both of which were highly effective in prevention of HIV infection. Since the last published guidance regarding the cotreatment of people with anti-seizure medications (ASM) and antiretroviral treatments (ARTs) in 2012, both fields have numerous new medication options. Historically, cotreatment of HIV and seizures could be challenging with increased risk of virologic failure and barriers in access to health care due to global availability, social determinants of health, and stigma of both HIV and seizures. In this narrative review, we describe the data-driven and expected bidirectional pharmacokinetic (PK) interactions between guideline-based PrEP and PEP treatment and ASM, as well as overlapping side effects. There are many ASMs with no known interaction with PrEP or PEP regimens. The interactions focus on enzyme inducing ASMs, valproate, and lamotrigine. Most prominently, enzyme inducing ASMs lower serum levels of tenofovir-containing PrEP regimens and elements of PEP (dolutegravir, raltegravir, and ritonavir), which increased risk of virologic treatment failure in people with HIV but have unclear clinical significance on the effectiveness of PrEP and PEP. In addition, ritonavir treatment in PEP may significantly lower lamotrigine serum levels even during the 4 weeks of treatment, which may increase risk for breakthrough seizures during PEP and skin reactions after discontinuation of ritonavir. In addition to PK interactions, overlapping side effects are common including osteopenia, hepatic toxicity, and other gastrointestinal effects. This narrative review aims to be a resource for all clinicians prescribing ASMs so that they can create a welcoming environment to enable successful treatment of seizures and reduce the risk of HIV infection in people at risk. In addition, we highlight knowledge gaps and areas of unmet need that can be addressed with future studies.

Measures to Mitigate Sodium Valproate Use in Pregnant Women With Epilepsy

Sodium valproate is a sodium salt of valproic acid. It is often used in the medical treatment of several conditions like epilepsy, bipolar disorder, mania, and migraines. This review debates whether the usage of valproic acid is appropriate in pregnancy. It also lists the various neonatal deformities and other teratogenic effects the said drug presents due to prenatal exposure to the drug and the implications of continuing drug therapy in certain situations. We should often weigh the outcomes and implement it only in conditions where its use is inevitable. It also includes the importance of awareness among middle-aged women with mental illness regarding the teratogenic effects of sodium valproate use and the relevance of discussion by physicians with patients regarding the usage of this drug despite being aware of the complications. It also explores other treatment options and modalities that can be used in the place of valproic acid for epilepsy and bipolar disorder in pregnant women and women of the reproductive age group, and how we can mitigate the usage of this drug by implementing various measures by referring to various guidelines present in different areas of the world. In summary, this article explores the numerous teratogenic effects sodium valproate presents in pregnancy, alternative medications, and treatment options instead of valproate. It also enumerates conditions where valproate use is necessary and how we can reduce and prevent the usage of valproate in pregnancy by opting for pregnancy prevention programs during valproate use and various other guidelines.