Abstract

Polypharmacy can lead to drug-drug interactions (DDIs), especially with ART. The burden of co-medications, including over-the-counter (OTC) drugs and self-medications, could be underestimated. We aimed to investigate the proportion of people living with HIV (PLHIV) with declared and undeclared co-medications, as well as their potential burden. We conducted a national, multicentre, 1 week cross-sectional study between 10 December and 16 December 2019 in 23 French hospitals amongst consecutive adult PLHIV presenting for a routine outpatient visit. A standardized questionnaire filled in by the physicians assessed all medications and other active chemical substances taken by the PLHIV. Overall we enrolled 496 participants from 23 centres. Median age was 50.6 years; ART regimens included an integrase inhibitor in 61% (n = 302), an NNRTI in 34% (n = 169) and a PI in 14% (n = 70) of the cases. Co-medications involved 392 (79%) PLHIV, among which 85 (17%) received polypharmacy (≥5 medications). Previously unknown co-medications or other active substances were found for 32% (n = 159) of the participants. Corticosteroids (9%, n = 46) and proton pump inhibitors (10%, n = 50) were frequently administered. These co-medications did not differ according to age range. Illegal drug use was declared by 11% (n = 54) and OTC drugs by 23% (n = 113) of PLHIV. Potential DDIs were discovered for 11% (n = 53), leading to treatment modifications in 47% (25/53) of cases. Potential DDIs that lead to therapeutic modifications remain significant whatever the age of PLHIV. More devoted time to identify co-medications and OTC treatment is needed in all PLHIV.

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