In the case scenario below, I discuss the implications of the verapamil phenytoin interaction. JS is a 38-year-old male who has been on phenytoin for seizure prophylaxis for several years. He reports to his primary care provider complaining of severe headaches. He is...
When the NOACs (sometimes referred to as DOACs) first came out they were heavily promoted as having fewer drug interactions compared to warfarin. This is true, but please remember that “fewer drug interactions” doesn’t mean “no drug...
A 62-year-old male had a heart attack about 9 months ago. He was stented and placed on both aspirin 81 mg daily and clopidogrel 75 mg daily. He presents today to the emergency department and is diagnosed with a STEMI. His wife is wondering why the medications used to...
Enzyme inducers most frequently reduce the concentrations of other drugs. This can ultimately lead to treatment failure. In rare situations (i.e. prodrugs), starting an enzyme inducer can potentially raise concentrations of the active metabolite and increase the risk...
Phenytoin drug interactions are common in our polypharmacy patient. The key is to monitor patients closely as well as carefully reviewing the medication list when a new medication is going to be started or changed. While there are numerous drug interactions with this...
