Enhanced Drug Absorption with Food – Opportunities for Pharmaceutical Intervention

Abstract

Drug absorption after oral administration is crucial for achieving a therapeutic effect, and one of the most important external factors influencing this process is food intake. While some drugs are recommended to be taken on an empty stomach due to possible inhibition of absorption, for others—especially lipophilic and poorly soluble drugs—the presence of food, particularly high-fat meals, can significantly enhance bioavailability. This paper analyzes drugs from various therapeutic classes whose systemic exposure increases when taken with food, including antifungals, retinoids, antiretroviral drugs, antiviral agents for hepatitis C, antineoplastics, and antimalarials. A total of 16 drugs are presented, with reported absorption increases ranging from 1.5- to as much as 16-fold in the presence of food. Particular emphasis is placed on the role of pharmacists in identifying such drugs and counseling patients on optimal timing of administration, type of meal, and the importance of consistency in therapy. Pharmaceutical intervention in this context includes patient education on proper drug administration, prevention of therapeutic failure, and improvement of therapeutic outcomes. The paper highlights the need to integrate nutritional recommendations into everyday pharmaceutical practice and to strengthen the pharmacist's role in therapy personalization.