[Drug dispensation at both community and hospital pharmacy, the highly active antiretrovirals example]. / Le double circuit de dispensation, exemple des traitements antirétroviraux : quelle pertinence ?

OBJECTIVES: Highly active antiretroviral therapies against the human immunodeficiency virus are available for patients in France in community pharmacy or in hospital pharmacy. More than 20 years after the implementation of the dual delivery system, it seems necessary to question the relevance of the dual dispensing circuit both in terms of service provided to patients and expenditure for health insurance. METHODS: The health insurance files were used to quantify the delivery of antiretrovirals therapies in the community pharmacy and in the hospital pharmacy. A survey was performed involving patients to find out their point of view on dispensing in hospital pharmacy and were the patients came from. The differential cost from the health insurance point of view between the two delivery system was calculated on the basis of the quantities delivered and the purchase prices at the hospital center in 2018. RESULTS: More than 80% of the quantities of antiretrovirals therapies are now delivered by community pharmacies. The arguments in favor of the antiretrovirals therapies dispensation by hospital pharmacy forwarded by patients are the anonymity and constant medicines availability. Health insurance is required to refund a drug at different prices depending on the delivery place, for about 37€ per box in favour of hospital dispensing. CONCLUSION: This study presents a complete inventory of the dual delivery system for antiretroviral therapies. Hospital and community therefore remain complementary to welcome outptients who will seek different delivery methods there. Little known to patients and professionals, this dual delivery system generates complexities at the stages of prescription, dispensing and reimbursement. It only concerns a minority of patients and its benefit for health insurance seems uncertain.

Influence of treatment with neutralizing monoclonal antibodies on the SARS-CoV-2 nasopharyngeal load and quasispecies.

OBJECTIVES: To evaluate the impact of neutralizing monoclonal antibody (mAb) treatment and to determine whether the selective pressure of mAbs could facilitate the proliferation of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants with spike protein mutations that might attenuate mAb effectiveness. PATIENTS AND METHODS: We evaluated the impact of mAbs on the nasopharyngeal (NP) viral load and virus quasispecies of mAb-treated patients using single-molecule real-time sequencing. The mAbs used were: Bamlanivimab alone (four patients), Bamlanivimab/Etesevimab (23 patients) and Casirivimab/Imdevimab (five patients). RESULTS: The NP SARS-CoV-2 viral load of mAb-treated patients decreased from 8.2 log10 copies/mL before administration to 4.3 log10 copies/mL 7 days after administration. Five immunocompromised patients given Bamlanivimab/Etesevimab were found to have mAb activity-reducing spike mutations. Two patients harboured SARS-CoV-2 variants with a Q493R spike mutation 7 days after administration, as did a third patient 14 days after administration. The fourth patient harboured a variant with a Q493K spike mutation 7 days post-treatment, and the fifth patient had a variant with a E484K spike mutation on day 21. The emergence of the spike mutation was accompanied by stabilization or rebound of the NP viral load in three of five patients. CONCLUSION: Two-mAb therapy can drive the selection of resistant SARS-CoV-2 variants in immunocompromised patients. Patients given mAbs should be closely monitored and measures to limit virus spread should be reinforced.