Which medications taken by Liliana need further teaching due to interactions with antitubercular treatments?

The combination of phenytoin and oral contraceptives warrants further teaching because of the potential for drug interactions that can affect the efficacy of either medication. Phenytoin can induce hepatic enzymes, which may accelerate the metabolism of certain oral contraceptives, potentially leading to reduced contraceptive effectiveness and an increased risk of unintended pregnancy.

This interaction is particularly significant for patients who rely on oral contraceptives for birth control, as it can alter their intended effects. Ensuring that patients are informed about this interaction is crucial for promoting safe medication management and preventing unintended consequences.

On the other hand, acetaminophen and dicyclomine do not have reported significant interactions with antitubercular treatments, thus they are less of a concern in the context of further teaching about medication interactions. Therefore, phenytoin along with oral contraceptives specifically stands out as requiring additional patient education regarding their combined use.