A PHASE 1, RANDOMIZED, DOUBLE-BLIND, SPONSOR-OPEN, VEHICLE-CONTROLLED, FIRST-IN-HUMAN, MULTIPLE-DOSE STUDY, TO INVESTIGATE THE SAFETY, TOLERABILITY, AND PHARMACOKINETICS, OF TOPICALLY ADMINISTERED PF-07295324 AND PF-07259955, IN HEALTHY ADULT PARTICIPANTS

Number of Participants With Clinically Significant Abnormalities in Electrocardiogram (ECG) Findings

Time Frame: At screening, on Days 1, 2, 5, 7, 10, 11, at discharge (Day 12), and at early termination if applicable

ECG abnormalities criteria included: 1) maximum QTc interval adjusted according Fridericia formula (QTcF) (msec): 450\<= QTcF \<480, 480\<= QTcF \<500, and QTcF \>=500; QTcF maximum increase from baseline (msec): 30\<= change \<60, and change \>=60; 2) maximum PR interval (msec): \>=300; PR increase from baseline (msec): baseline \>200 with 25% increase at maximum, baseline \<=200 with 50% increase at maximum; 3) maximum QRS (msec): \>=140; QRS increase from baseline (msec) \>=50%. Baseline was defined as the average of the last triplicate measurement prior to the first dosing. ECG abnormalities reported for at least 1 participant are presented here.

Skin Irritation Assessments Using Draize Scoring

Time Frame: Screening up to Day 12 or early termination if applicable

Application site toleration was assessed by Draize scoring. Draize scores were defined as: 0 = No reaction visible, 1 = Trace reaction - barely perceptible pinkness, 2 = Mild reaction - readily visible pinkness, 3 = Moderate reaction - definite redness, 4 = Strong to severe reaction - very intense redness. Participants with at least 1 instance of Draize score \>0 were listed.

Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)

Time Frame: Baseline up to the end of follow up (ie, up to 44 days)

An AE was any untoward medical occurrence in a clinical investigation where participant administered a product; the event did not need to have a causal relationship with the treatment. A SAE was any untoward medical occurrence at any dose that resulted in death; was life threatening; required inpatient hospitalization or prolongation of existing hospitalization; resulted in persistent or significant disability/incapacity; resulted in congenital anomaly/birth defect. AEs included both SAEs and non-serious AEs. Treatment-related AEs and SAEs were determined by the investigator.

Number of Participants With Laboratory Abnormalities

Time Frame: At screening, admission (Day -1), on Days 5, 7, 10, at discharge (Day 12), and at early termination if applicable

Hematology parameters included hemoglobin, hematocrit, red blood cell count, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, platelet and white blood cell count, total neutrophils, eosinophils, monocytes, basophils, reticulocytes, and lymphocytes. Chemistry parameters included blood urea nitrogen, creatinine, glucose (fasting), calcium, sodium, potassium, chloride, total bicarbonate, aspartate aminotransferase, alanine aminotransferase, total bilirubin, alkaline phosphatase, uric acid, albumin, total protein. Urine parameters included pH, glucose, protein, blood, ketones, nitrites, leukocyte esterase, urobilinogen, urine bilirubin, microscopy. Only those categories in which at least 1 participant had abnormal data were reported.

Number of Participants With Vital Signs Abnormalities

Time Frame: At screening, on Days 1, 2, 5, 7, 10, 11, at discharge (Day 12), and at early termination if applicable

Criteria for abnormality in vital signs: supine pulse rate \<40 beats per minute (bpm) or \>120 bpm; supine diastolic blood pressure (DBP) \<50 mmHg, maximum increase or decrease from baseline of \>=20 mmHg; supine systolic blood pressure (SBP) \<90 mmHg, maximum increase or decrease from baseline of \>=30 mmHg. Baseline was defined as the last measurement prior to the first dosing. Vital sign abnormalities reported for at least 1 participant are presented here.