Scientists map out antiviral Drug's journey in tiny human trial

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Male and female participants must be 18 to 55 years of age, inclusive, at the time of signing the ICD. 2. Participants who are overtly healthy as determined by medical evaluation including medical history, physical examination, laboratory tests, and ECGs. 3. Participants who are willing and able to comply with all scheduled visits, treatment plan, laboratory tests, lifestyle considerations, and other study procedures. 4. BMI of 18 to 32 kg/m2; and a total body weight \>50 kg (110 lb). Exclusion Criteria: 1. Evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurological, or allergic disease (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at the time of dosing). 2. Positive test result for SARS-CoV-2 infection at the time of Screening or Day -1. 3. Use of prescription or nonprescription drugs and dietary and herbal supplements within 7 days or 5 half lives (whichever is longer) prior to the first dose of study intervention. 4. Previous administration with an investigational drug within 30 days (or as determined by the local requirement) or 5 half lives preceding the first dose of study intervention used in this study (whichever is longer). 5. Participants who have received a COVID-19 vaccine within the past 2 weeks; and/or participants who are scheduled to receive a second COVID-19 vaccination dose during the in-clinical period of this study. 6. A positive urine drug test. 7. Total 14C radioactivity measured in plasma exceeding 11 mBq/mL at "Screening" . 8. Females who are breastfeeding. 9. History of tobacco or nicotine use within 3 months prior to dosing, or a positive cotinine at screening or Day -1. 10. Participants enrolled in a previous radionucleotide study or who have received radiotherapy within 12 months prior to screening or such that total radioactivity would exceed acceptable dosimetry (ie, occupational exposure of 5 rem per year). 13\. Participants whose occupation requires exposure to radiation or monitoring of radiation exposure. 14\. Investigator site staff or Pfizer employees directly involved in the conduct of the study, site staff otherwise supervised by the investigator, and their respective family members.