Thirty healthy subjects, 50% male and 50% female, were randomized into 45, 90, and 180 μg dose groups (ten subjects in each) for the determination of the click here pharmacokinetic profile of a single-dose BCQB by the investigator. Another ten subjects, 50% male Baf-A1 manufacturer and 50% female, were administrated 120 μg of BCQB by intranasal sprays on day 1; received no treatment on day 2; and continued to receive the study drug three times daily (at 7:30am, 12:00pm and 7:00pm) from days 3 through 7 to assess multiple-dose

pharmacokinetics (see table II). The subjects were required to fast overnight (12 hours) before administration, while standard meals and water intake were provided 2 hours post-dose. Blood samples (5 mL) were collected at 0 hours (pre-dose), 2, 5, 10, 15, 30 minutes, 1, 2, 3, 5, 7, 12, 24, and 48 hours post-dose

for the single-dose study. For the check details multiple-dose study, blood samples (5 mL) were collected prior to dosing on days 1, 5, 6, and 7 (0 hours prior to dosing) and 2, 5, 10, 15, 30 minutes, 1, 2, 3, 5, 7, 9, 12, 15, 24, and 36 hours post-dose on day 1 and day 7. Plasma was separated and stored at −20°C for analysis. Urine samples were collected at 0 hours (pre-dose), 0–2, 2–4, 4–6, 6–8, 8–10, 10–12, 12–24, 24–36, and 36–48 hours post-dose for the single-dose study. The total volume of urine in each time interval was recorded and stored at −20°C for analysis. Safety Monitoring Throughout the study, all subjects remained in the study unit under continuous observation. Details of adverse events (AEs) were obtained and recorded by the study physicians.

Routine safety and tolerability were evaluated through AE reporting Thiamet G by the investigators and subjects, on the basis of vital signs, physical examination, laboratory examination (routine blood, urine and feces test, occult blood test and blood biochemical test) and ECG, which were performed at scheduled intervals during the studies. AEs that occurred during the study were classified as mild (awareness of a sign or symptom but comfortably tolerated), moderate (discomfort that may interfere with daily activities) or serious (death, life-threatening, requiring hospitalization or incapacitating). AEs were recorded and reported according to GCP. Pharmacokinetic Measurement The concentrations of BCQB in plasma and urine were determined by validated liquid chromatography-mass spectrometry methods,[20,21] . The lower limit of quantitation (LLOQ) of BCQB in plasma was 5 pg/mL, while in urine it was 0.02 ng/mL. The pharmacokinetic parameters were calculated by WinNonlin Professional software (Version 6.1, Pharsight Corporation, Mountain View, CA, USA) using non-compartmental methods.