Symptoms, Viral Loads, and Rebound Among Coronavirus Disease 2019 (COVID-19) Outpatients Treated With Nirmatrelvir/Ritonavir Compared With Propensity Score–Matched Untreated Individuals

Author:

Smith-Jeffcoat Sarah E1ORCID,Biddle Jessica E2ORCID,Talbot H Keipp3ORCID,Morrissey Kerry Grace4ORCID,Stockwell Melissa S567ORCID,Maldonado Yvonne8ORCID,McLean Huong Q9ORCID,Ellingson Katherine D10ORCID,Bowman Natalie M11ORCID,Asturias Edwin12ORCID,Mellis Alexandra M2ORCID,Johnson Sheroi2ORCID,Kirking Hannah L1ORCID,Rolfes Melissa A R2ORCID,Olivo Vanessa4,Merrill Lori4ORCID,Battan-Wraith Steph4ORCID,Sano Ellen713ORCID,McLaren Son H713ORCID,Vargas Celibell Y14,Goodman Sara8,Sarnquist Clea C8ORCID,Govindaranjan Prasanthi8,Petrie Joshua G9ORCID,Belongia Edward A9ORCID,Ledezma Karla10,Pryor Kathleen10,Lutrick Karen10ORCID,Bullock Ayla11,Yang Amy11,Haehnel Quenla11,Rao Suchitra12ORCID,Zhu Yuwei3,Schmitz Jonathan3,Hart Kimberly3,Grijalva Carlos G3,Salvatore Phillip P1ORCID

Affiliation:

1. Coronavirus and Other Respiratory Viruses Division, Centers for Disease Control and Prevention , Atlanta, Georgia , USA

2. Influenza Division, Centers for Disease Control and Prevention , Atlanta, Georgia , USA

3. Vanderbilt University Medical Center , Nashville, Tennessee , USA

4. Westat , Rockville, Maryland , USA

5. Division of Child and Adolescent Health, Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons , New York, New York , USA

6. Department of Population and Family Health, Columbia University Mailman School of Public Health, New York, New York, USA

7. New York-Presbyterian Hospital , New York, New York , USA

8. Stanford University School of Medicine , Stanford, California , USA

9. Marshfield Clinic Research Institute , Marshfield, Wisconsin , USA

10. University of Arizona College of Medicine , Tucson, Arizona , USA

11. University of North Carolina , Chapel Hill, North Carolina , USA

12. Children's Hospital Colorado , Aurora, Colorado , USA

13. Department of Emergency Medicine, Columbia University Vagelos College of Physicians and Surgeons , New York, New York, USA

14. Division of Child and Adolescent Health, Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons, New York, New York, USA

Abstract

Abstract Background Nirmatrelvir/ritonavir (N/R) reduces severe outcomes from coronavirus disease 2019 (COVID-19); however, rebound after treatment has been reported. We compared symptom and viral dynamics in individuals with COVID-19 who completed N/R treatment and similar untreated individuals. Methods We identified symptomatic participants who tested severe acute respiratory syndrome coronavirus 2–positive and were N/R eligible from a COVID-19 household transmission study. Index cases from ambulatory settings and their households contacts were enrolled. We collected daily symptoms, medication use, and respiratory specimens for quantitative polymerase chain reaction for 10 days during March 2022—May 2023. Participants who completed N/R treatment (treated) were propensity score matched to untreated participants. We compared symptom rebound, viral load (VL) rebound, average daily symptoms, and average daily VL by treatment status measured after N/R treatment completion or 7 days after symptom onset if untreated. Results Treated (n = 130) and untreated participants (n = 241) had similar baseline characteristics. After treatment completion, treated participants had greater occurrence of symptom rebound (32% vs 20%; P = .009) and VL rebound (27% vs 7%; P < .001). Average daily symptoms were lower among treated participants without symptom rebound (1.0 vs 1.6; P < .01) but not statistically lower with symptom rebound (3.0 vs 3.4; P = .5). Treated participants had lower average daily VLs without VL rebound (0.9 vs 2.6; P < .01) but not statistically lower with VL rebound (4.8 vs 5.1; P = .7). Conclusions Individuals who completed N/R treatment experienced fewer symptoms and lower VL but rebound occured more often compared with untreated individuals. Providers should prescribe N/R, when indicated, and communicate rebound risk to patients.

Funder

CDC

Trustees of Columbia University

Vanderbilt University Medical Center

RVTN

Publisher

Oxford University Press (OUP)

Subject

Infectious Diseases,Microbiology (medical)

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